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UAL-Analyzer.ps1
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UAL-Analyzer.ps1
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# UAL-Analyzer
#
# @author: Martin Willing
# @copyright: Copyright (c) 2024 Martin Willing. All rights reserved. Licensed under the MIT license.
# @contact: Any feedback or suggestions are always welcome and much appreciated - [email protected]
# @url: https://lethal-forensics.com/
# @date: 2024-12-17
#
#
# ██╗ ███████╗████████╗██╗ ██╗ █████╗ ██╗ ███████╗ ██████╗ ██████╗ ███████╗███╗ ██╗███████╗██╗ ██████╗███████╗
# ██║ ██╔════╝╚══██╔══╝██║ ██║██╔══██╗██║ ██╔════╝██╔═══██╗██╔══██╗██╔════╝████╗ ██║██╔════╝██║██╔════╝██╔════╝
# ██║ █████╗ ██║ ███████║███████║██║█████╗█████╗ ██║ ██║██████╔╝█████╗ ██╔██╗ ██║███████╗██║██║ ███████╗
# ██║ ██╔══╝ ██║ ██╔══██║██╔══██║██║╚════╝██╔══╝ ██║ ██║██╔══██╗██╔══╝ ██║╚██╗██║╚════██║██║██║ ╚════██║
# ███████╗███████╗ ██║ ██║ ██║██║ ██║███████╗ ██║ ╚██████╔╝██║ ██║███████╗██║ ╚████║███████║██║╚██████╗███████║
# ╚══════╝╚══════╝ ╚═╝ ╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝ ╚═╝ ╚═════╝ ╚═╝ ╚═╝╚══════╝╚═╝ ╚═══╝╚══════╝╚═╝ ╚═════╝╚══════╝
#
#
# Dependencies:
#
# ImportExcel v7.8.10 (2024-10-21)
# https://github.com/dfinke/ImportExcel
#
# IPinfo CLI 3.3.1 (2024-03-01)
# https://ipinfo.io/signup?ref=cli --> Sign up for free
# https://github.com/ipinfo/cli
#
# xsv v0.13.0 (2018-05-12)
# https://github.com/BurntSushi/xsv
#
#
# Tested on Windows 10 Pro (x64) Version 22H2 (10.0.19045.5247) and PowerShell 5.1 (5.1.19041.5247)
# Tested on Windows 10 Pro (x64) Version 22H2 (10.0.19045.5247) and PowerShell 7.4.6
#
#
#############################################################################################################################################################################################
#############################################################################################################################################################################################
<#
.SYNOPSIS
UAL-Analyzer - Automated Processing of M365 Unified Audit Logs for DFIR
.DESCRIPTION
UAL-Analyzer.ps1 is a PowerShell script utilized to simplify the analysis of M365 Unified Audit Logs extracted via "Microsoft Extractor Suite" by Invictus Incident Response.
https://github.com/invictus-ir/Microsoft-Extractor-Suite (Microsoft-Extractor-Suite v2.1.1)
https://microsoft-365-extractor-suite.readthedocs.io/en/latest/functionality/UnifiedAuditLog.html
Single User Audit
.PARAMETER OutputDir
Specifies the output directory. Default is "$env:USERPROFILE\Desktop\UAL-Analyzer".
Note: The subdirectory 'UAL-Analyzer' is automatically created.
.PARAMETER Path
Specifies the path to the CSV-based input file (UAL-Combined.csv).
.EXAMPLE
PS> .\UAL-Analyzer.ps1
.EXAMPLE
PS> .\UAL-Analyzer.ps1 -Path "$env:USERPROFILE\Desktop\UAL-Combined.csv"
.EXAMPLE
PS> .\UAL-Analyzer.ps1 -Path "H:\Microsoft-Extractor-Suite\UAL-Combined.csv" -OutputDir "H:\Microsoft-Analyzer-Suite"
.NOTES
Author - Martin Willing
.LINK
https://lethal-forensics.com/
#>
#############################################################################################################################################################################################
#############################################################################################################################################################################################
# Notes
# Audit (Standard)
# The default retention period for Audit (Standard) has changed from 90 days to 180 days.
# Audit (Standard) logs generated before October 17, 2023 are retained for 90 days. Audit (Standard) logs generated on or after October 17, 2023 follow the new default retention of 180 days.
# Audit (Premium)
# To retain an audit log for longer than 180 days (and up to 1 year), the user who generates the audit log (by performing an audited activity) must be assigned an Office 365 E5 or Microsoft 365 E5 license or have a Microsoft 365 E5 Compliance or E5 eDiscovery and Audit add-on license.
# To retain audit logs for 10 years, the user who generates the audit log must also be assigned a 10-year audit log retention add-on license in addition to an E5 license.
# https://learn.microsoft.com/en-us/purview/audit-log-retention-policies#default-audit-log-retention-policy
##############################################################################################################################
# Audit (Standard) # Audit (Premium) #
##############################################################################################################################
# 180 days # 180 days --> 365 days # 10 years #
##############################################################################################################################
# # Office 365 E5 # 10-year audit log retention add-on license in addition to an E5 license #
# # Microsoft 365 E5 # #
# # Microsoft 365 E5 Compliance # #
# # E5 eDiscovery # #
# # Audit add-on license # #
##############################################################################################################################
#############################################################################################################################################################################################
#############################################################################################################################################################################################
#region CmdletBinding
[CmdletBinding()]
Param(
[String]$Path,
[String]$OutputDir
)
#endregion CmdletBinding
#############################################################################################################################################################################################
#############################################################################################################################################################################################
#region Initialisations
# Set Progress Preference to Silently Continue
$OriginalProgressPreference = $Global:ProgressPreference
$Global:ProgressPreference = 'SilentlyContinue'
#endregion Initialisations
#############################################################################################################################################################################################
#############################################################################################################################################################################################
#region Declarations
# Declarations
# Script Root
if ($PSVersionTable.PSVersion.Major -gt 2)
{
# PowerShell 3+
$SCRIPT_DIR = $PSScriptRoot
}
else
{
# PowerShell 2
$SCRIPT_DIR = Split-Path -Parent $MyInvocation.MyCommand.Definition
}
# Colors
Add-Type -AssemblyName System.Drawing
$script:Green = [System.Drawing.Color]::FromArgb(0,176,80) # Green
$script:Orange = [System.Drawing.Color]::FromArgb(255,192,0) # Orange
# Output Directory
if (!($OutputDir))
{
$script:OUTPUT_FOLDER = "$env:USERPROFILE\Desktop\UAL-Analyzer" # Default
}
else
{
if ($OutputDir -cnotmatch '.+(?=\\)')
{
Write-Host "[Error] You must provide a valid directory path." -ForegroundColor Red
Exit
}
else
{
$script:OUTPUT_FOLDER = "$OutputDir\UAL-Analyzer" # Custom
}
}
# Tools
# IPinfo CLI
$script:IPinfo = "$SCRIPT_DIR\Tools\IPinfo\ipinfo.exe"
# xsv
$script:xsv = "$SCRIPT_DIR\Tools\xsv\xsv.exe"
# ASN Whitelist
$script:Whitelist = (Import-Csv "$SCRIPT_DIR\Whitelists\ASN-Whitelist.csv" -Delimiter "," | Select-Object -ExpandProperty ASN) -join "|"
# Configuration File
if(!(Test-Path "$PSScriptRoot\Config.ps1"))
{
Write-Host "[Error] Config.ps1 NOT found." -ForegroundColor Red
}
else
{
. "$PSScriptRoot\Config.ps1"
}
#endregion Declarations
#############################################################################################################################################################################################
#############################################################################################################################################################################################
#region Header
# Windows Title
$DefaultWindowsTitle = $Host.UI.RawUI.WindowTitle
$Host.UI.RawUI.WindowTitle = "UAL-Analyzer - Automated Processing of M365 Unified Audit Logs for DFIR"
# Check if the PowerShell script is being run with admin rights
if (!([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole]::Administrator))
{
Write-Host "[Error] This PowerShell script must be run with admin rights." -ForegroundColor Red
$Host.UI.RawUI.WindowTitle = "$DefaultWindowsTitle"
Exit
}
# Flush Output Directory
if (Test-Path "$OUTPUT_FOLDER")
{
Get-ChildItem -Path "$OUTPUT_FOLDER" -Force -Recurse -ErrorAction SilentlyContinue | Remove-Item -Force -Recurse
New-Item "$OUTPUT_FOLDER" -ItemType Directory -Force | Out-Null
}
else
{
New-Item "$OUTPUT_FOLDER" -ItemType Directory -Force | Out-Null
}
# Add the required MessageBox class (Windows PowerShell)
Add-Type -AssemblyName System.Windows.Forms
# Function Get-FileSize
Function Get-FileSize()
{
Param ([long]$Length)
If ($Length -gt 1TB) {[string]::Format("{0:0.00} TB", $Length / 1TB)}
ElseIf ($Length -gt 1GB) {[string]::Format("{0:0.00} GB", $Length / 1GB)}
ElseIf ($Length -gt 1MB) {[string]::Format("{0:0.00} MB", $Length / 1MB)}
ElseIf ($Length -gt 1KB) {[string]::Format("{0:0.00} KB", $Length / 1KB)}
ElseIf ($Length -gt 0) {[string]::Format("{0:0.00} Bytes", $Length)}
Else {""}
}
# Select Log File
if(!($Path))
{
Function Get-LogFile($InitialDirectory)
{
[System.Reflection.Assembly]::LoadWithPartialName("System.Windows.Forms") | Out-Null
$OpenFileDialog = New-Object System.Windows.Forms.OpenFileDialog
$OpenFileDialog.InitialDirectory = $InitialDirectory
$OpenFileDialog.Filter = "Unified Audit Log Files |UAL-Combined.csv|All Files (*.*)|*.*"
$OpenFileDialog.ShowDialog()
$OpenFileDialog.Filename
$OpenFileDialog.ShowHelp = $true
$OpenFileDialog.Multiselect = $false
}
$Result = Get-LogFile
if($Result -eq "OK")
{
$script:LogFile = $Result[1]
}
else
{
$Host.UI.RawUI.WindowTitle = "$DefaultWindowsTitle"
Exit
}
}
else
{
$script:LogFile = $Path
}
# Create a record of your PowerShell session to a text file
Start-Transcript -Path "$OUTPUT_FOLDER\Transcript.txt"
# Get Start Time
$startTime = (Get-Date)
# Logo
$Logo = @"
██╗ ███████╗████████╗██╗ ██╗ █████╗ ██╗ ███████╗ ██████╗ ██████╗ ███████╗███╗ ██╗███████╗██╗ ██████╗███████╗
██║ ██╔════╝╚══██╔══╝██║ ██║██╔══██╗██║ ██╔════╝██╔═══██╗██╔══██╗██╔════╝████╗ ██║██╔════╝██║██╔════╝██╔════╝
██║ █████╗ ██║ ███████║███████║██║█████╗█████╗ ██║ ██║██████╔╝█████╗ ██╔██╗ ██║███████╗██║██║ ███████╗
██║ ██╔══╝ ██║ ██╔══██║██╔══██║██║╚════╝██╔══╝ ██║ ██║██╔══██╗██╔══╝ ██║╚██╗██║╚════██║██║██║ ╚════██║
███████╗███████╗ ██║ ██║ ██║██║ ██║███████╗ ██║ ╚██████╔╝██║ ██║███████╗██║ ╚████║███████║██║╚██████╗███████║
╚══════╝╚══════╝ ╚═╝ ╚═╝ ╚═╝╚═╝ ╚═╝╚══════╝ ╚═╝ ╚═════╝ ╚═╝ ╚═╝╚══════╝╚═╝ ╚═══╝╚══════╝╚═╝ ╚═════╝╚══════╝
"@
Write-Output ""
Write-Output "$Logo"
Write-Output ""
# Header
Write-Output "UAL-Analyzer - Automated Processing of M365 Unified Audit Logs for DFIR"
Write-Output "(c) 2024 Martin Willing at Lethal-Forensics (https://lethal-forensics.com/)"
Write-Output ""
# Analysis date (ISO 8601)
$script:AnalysisDate = [datetime]::Now.ToUniversalTime().ToString("yyyy-MM-dd HH:mm:ss")
Write-Output "Analysis date: $AnalysisDate UTC"
Write-Output ""
# Create HashTable and import 'Application-Blacklist.csv'
$script:ApplicationBlacklist_HashTable = [ordered]@{}
if (Test-Path "$SCRIPT_DIR\Blacklists\Application-Blacklist.csv")
{
if([int](& $xsv count "$SCRIPT_DIR\Blacklists\Application-Blacklist.csv") -gt 0)
{
Import-Csv "$SCRIPT_DIR\Blacklists\Application-Blacklist.csv" -Delimiter "," | ForEach-Object { $ApplicationBlacklist_HashTable[$_.AppId] = $_.AppDisplayName,$_.Severity }
# Count Ingested Properties
$Count = $ApplicationBlacklist_HashTable.Count
Write-Output "[Info] Initializing 'Application-Blacklist.csv' Lookup Table ($Count) ..."
}
}
# Create HashTable and import 'ASN-Blacklist.csv'
$script:AsnBlacklist_HashTable = [ordered]@{}
if (Test-Path "$SCRIPT_DIR\Blacklists\ASN-Blacklist.csv")
{
if([int](& $xsv count "$SCRIPT_DIR\Blacklists\ASN-Blacklist.csv") -gt 0)
{
Import-Csv "$SCRIPT_DIR\Blacklists\ASN-Blacklist.csv" -Delimiter "," | ForEach-Object { $AsnBlacklist_HashTable[$_.ASN] = $_.OrgName,$_.Info }
# Count Ingested Properties
$Count = $AsnBlacklist_HashTable.Count
Write-Output "[Info] Initializing 'ASN-Blacklist.csv' Lookup Table ($Count) ..."
}
}
# Create HashTable and import 'Country-Blacklist.csv'
$script:CountryBlacklist_HashTable = [ordered]@{}
if (Test-Path "$SCRIPT_DIR\Blacklists\Country-Blacklist.csv")
{
if([int](& $xsv count "$SCRIPT_DIR\Blacklists\Country-Blacklist.csv") -gt 0)
{
Import-Csv "$SCRIPT_DIR\Blacklists\Country-Blacklist.csv" -Delimiter "," | ForEach-Object { $CountryBlacklist_HashTable[$_."Country Name"] = $_.Country }
# Count Ingested Properties
$Count = $CountryBlacklist_HashTable.Count
Write-Output "[Info] Initializing 'Country-Blacklist.csv' Lookup Table ($Count) ..."
}
}
#endregion Header
#############################################################################################################################################################################################
#############################################################################################################################################################################################
#region Analysis
# Unified Audit Logs
Function Start-Processing {
$StartTime_Processing = (Get-Date)
# Input-Check
if (!(Test-Path "$LogFile" -PathType Leaf))
{
Write-Host "[Error] $LogFile does not exist." -ForegroundColor Red
Write-Host ""
Stop-Transcript
$Host.UI.RawUI.WindowTitle = "$DefaultWindowsTitle"
Exit
}
# Check File Extension
$Extension = [IO.Path]::GetExtension($LogFile)
if (!($Extension -eq ".csv" ))
{
Write-Host "[Error] No CSV File provided." -ForegroundColor Red
Write-Host ""
Stop-Transcript
$Host.UI.RawUI.WindowTitle = "$DefaultWindowsTitle"
Exit
}
# Check IPinfo CLI Access Token
if ("$Token" -eq "access_token")
{
Write-Host "[Error] No IPinfo CLI Access Token provided. Please add your personal access token to 'Config.ps1'" -ForegroundColor Red
Write-Host ""
Stop-Transcript
$Host.UI.RawUI.WindowTitle = "$DefaultWindowsTitle"
Exit
}
# UserId
$UserIds = Import-Csv -Path "$LogFile" -Delimiter "," | Select-Object UserIds | Sort-Object -Unique
$Count = ($UserIds | Measure-Object).Count
if ($Count -gt 1)
{
Write-Host "[Error] Single User Audit ONLY." -ForegroundColor Red
Stop-Transcript
$Host.UI.RawUI.WindowTitle = "$DefaultWindowsTitle"
Exit
}
else
{
$UserId = ($UserIds).UserIds
}
# Input Size
$InputSize = Get-FileSize((Get-Item "$LogFile").Length)
Write-Output "[Info] Total Input Size: $InputSize"
# Count rows of CSV (w/ thousands separators)
[int]$Count = & $xsv count "$LogFile"
$Rows = '{0:N0}' -f $Count | ForEach-Object {$_ -replace ' ','.'} # Replace Space with a dot (e.g. de-AT)
Write-Output "[Info] Total Lines: $Rows"
# Estimated Time (Average: 15 lines per second)
[int]$Average = "15"
$TotalSeconds = $Count / $Average
$TimeSpan = [TimeSpan]::FromSeconds($TotalSeconds)
# Processing M365 Unified Audit Logs
Write-Output "[Info] Processing M365 Unified Audit Logs ($UserId) ..."
New-Item "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV" -ItemType Directory -Force | Out-Null
New-Item "$OUTPUT_FOLDER\UnifiedAuditLogs\XLSX" -ItemType Directory -Force | Out-Null
# Get-Culture
# Get-Date
# Set-Culture -CultureInfo de-DE --> Get-Date => Dienstag, 27. Februar 2024 07:01:30
# Set-Culture -CultureInfo en-US --> Get-Date => Tuesday, February 27, 2024 7:00:43 AM
# Note: Restart PowerShell Console
# Check Thousands Separator
# (Get-Culture).NumberFormat.NumberGroupSeparator
# Check Timestamp Format
$Timestamp = (Import-Csv -Path "$LogFile" -Delimiter "," | Select-Object CreationDate -First 1).CreationDate
# de-DE
if ($Timestamp -match "\d{2}\.\d{2}\.\d{4} \d{2}:\d{2}:\d{2}")
{
$script:TimestampFormat = "dd.MM.yyyy HH:mm:ss"
}
# en-US
if ($Timestamp -match "\d{1,2}/\d{1,2}/\d{4} \d{1,2}:\d{2}:\d{2} (AM|PM)")
{
$script:TimestampFormat = "M/d/yyyy h:mm:ss tt"
}
# Time Frame
$StartDate = (Import-Csv -Path "$LogFile" -Delimiter "," | Select-Object @{Name="CreationDate";Expression={([DateTime]::ParseExact($_.CreationDate, "$TimestampFormat", [cultureinfo]::InvariantCulture).ToString("yyyy-MM-dd HH:mm:ss"))}} | Sort-Object { $_.CreationDate -as [datetime] } -Descending | Select-Object -Last 1).CreationDate
$EndDate = (Import-Csv -Path "$LogFile" -Delimiter "," | Select-Object @{Name="CreationDate";Expression={([DateTime]::ParseExact($_.CreationDate, "$TimestampFormat", [cultureinfo]::InvariantCulture).ToString("yyyy-MM-dd HH:mm:ss"))}} | Sort-Object { $_.CreationDate -as [datetime] } -Descending | Select-Object -First 1).CreationDate
Write-Output "[Info] Log data from $StartDate UTC until $EndDate UTC"
('[Info] Estimated Analysis Time: {0} h {1} min {2} sec' -f $TimeSpan.Hours, $TimeSpan.Minutes, $TimeSpan.Seconds)
# XLSX
# Untouched
if (Get-Module -ListAvailable -Name ImportExcel)
{
if (Test-Path "$LogFile")
{
if([int](& $xsv count -d "," "$LogFile") -gt 0)
{
$IMPORT = Import-Csv -Path "$LogFile" -Delimiter "," -Encoding UTF8 | Sort-Object { $_.CreationDate -as [datetime] } -Descending
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\XLSX\Untouched.xlsx" -NoNumberConversion * -FreezeTopRow -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "UAL- Untouched" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:J1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of columns A-D and F-J
$WorkSheet.Cells["A:D"].Style.HorizontalAlignment="Center"
$WorkSheet.Cells["F:J"].Style.HorizontalAlignment="Center"
}
}
}
}
# File Size (XLSX)
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\XLSX\1-Untouched.xlsx")
{
$Size = Get-FileSize((Get-Item "$OUTPUT_FOLDER\UnifiedAuditLogs\XLSX\1-Untouched.xlsx").Length)
Write-Output "[Info] File Size (XLSX) : $Size"
}
# AuditData
# CSV
Import-Csv -Path "$LogFile" -Delimiter "," | Select-Object -ExpandProperty AuditData | ConvertFrom-Json | Sort-Object { $_.CreationDate -as [datetime] } -Descending | Export-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\AuditData.csv" -NoTypeInformation -Encoding UTF8
# XLSX
if (Get-Module -ListAvailable -Name ImportExcel)
{
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\AuditData.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\AuditData.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\AuditData.csv" -Delimiter ","
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\XLSX\AuditData.xlsx" -NoHyperLinkConversion * -NoNumberConversion * -FreezeTopRow -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "AuditData" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:AA1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of columns A-AA
$WorkSheet.Cells["A:AA"].Style.HorizontalAlignment="Center"
}
}
}
}
# Custom CSV
$Data = Import-Csv -Path "$LogFile" -Delimiter "," -Encoding UTF8 | Sort-Object { $_.CreationDate -as [datetime] } -Descending
$Results = [Collections.Generic.List[PSObject]]::new()
ForEach($Record in $Data)
{
$AuditData = $Record.AuditData | ConvertFrom-Json
$ClientIP = $AuditData.ClientIP | & $IPinfo grepip -o # Remove Port Number from IPv4 (if existing)
$UserLoggedIn = $AuditData | Where-Object { $_.Operation -eq "UserLoggedIn" }
if ($null -ne $UserLoggedIn)
{
$SessionId = ($AuditData | Where-Object { $_.Operation -eq "UserLoggedIn" } | Select-Object -ExpandProperty DeviceProperties | Where-Object {$_.Name -eq 'SessionId'}).Value
$UserAgent = ($AuditData | Where-Object { $_.Operation -eq "UserLoggedIn" } | Select-Object -ExpandProperty ExtendedProperties | Where-Object {$_.Name -eq 'UserAgent'}).Value
}
else
{
$SessionId = ($AuditData | Select-Object SessionId).SessionId
$UserAgent = $AuditData.UserAgent
}
$Line = [PSCustomObject]@{
"CreationDate" = ($Record | Select-Object @{Name="CreationDate";Expression={([DateTime]::ParseExact($_.CreationDate, "$TimestampFormat", [cultureinfo]::InvariantCulture).ToString("yyyy-MM-dd HH:mm:ss"))}}).CreationDate
"UserId" = $Record.UserIds
"RecordType" = $Record.RecordType
"Operation" = $Record.Operations
"ObjectId" = $AuditData.ObjectId
"ClientIP" = $ClientIP
"ClientIPAddress" = $AuditData.ClientIPAddress
"UserAgent" = $UserAgent
"ClientInfoString" = $AuditData.ClientInfoString
"RequestType" = ($AuditData | Where-Object { $_.Operation -eq "UserLoggedIn" } | Select-Object -ExpandProperty ExtendedProperties | Where-Object {$_.Name -eq 'RequestType'}).Value
"SessionId" = $SessionId
"InterSystemsId" = $AuditData.InterSystemsId # The GUID that track the actions across components within the Office 365 service
"DeviceName" = ($AuditData | Where-Object { $_.Operation -eq "UserLoggedIn" } | Select-Object -ExpandProperty DeviceProperties | Where-Object {$_.Name -eq 'DisplayName'}).Value
"DeviceId" = ($AuditData | Where-Object { $_.Operation -eq "UserLoggedIn" } | Select-Object -ExpandProperty DeviceProperties | Where-Object {$_.Name -eq 'Id'}).Value
"OS" = ($AuditData | Where-Object { $_.Operation -eq "UserLoggedIn" } | Select-Object -ExpandProperty DeviceProperties | Where-Object {$_.Name -eq 'OS'}).Value
"BrowserType" = ($AuditData | Where-Object { $_.Operation -eq "UserLoggedIn" } | Select-Object -ExpandProperty DeviceProperties | Where-Object {$_.Name -eq 'BrowserType'}).Value
"IsCompliant" = ($AuditData | Where-Object { $_.Operation -eq "UserLoggedIn" } | Select-Object -ExpandProperty DeviceProperties | Where-Object {$_.Name -eq 'IsCompliant'}).Value
"IsCompliantAndManaged" = ($AuditData | Where-Object { $_.Operation -eq "UserLoggedIn" } | Select-Object -ExpandProperty DeviceProperties | Where-Object {$_.Name -eq 'IsCompliantAndManaged'}).Value
"Workload" = $AuditData.Workload
}
$Results.Add($Line)
}
$Results | Export-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv" -NoTypeInformation -Encoding UTF8
# Custom XLSX
if (Get-Module -ListAvailable -Name ImportExcel)
{
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv" -Delimiter ","
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\XLSX\Custom.xlsx" -NoHyperLinkConversion * -NoNumberConversion * -FreezePane 2,5 -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "Custom View" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:S1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of columns A-D and F-S
$WorkSheet.Cells["A:D"].Style.HorizontalAlignment="Center"
$WorkSheet.Cells["F:S"].Style.HorizontalAlignment="Center"
}
}
}
}
# XLSX
if (Get-Module -ListAvailable -Name ImportExcel)
{
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\SessionCookieTheft.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\SessionCookieTheft.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\SessionCookieTheft.csv" -Delimiter "," | Sort-Object @{Expression={ $_."ClientIP" -as [Int] }} -Descending
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\XLSX\SessionCookieTheft.xlsx" -FreezeTopRow -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "SessionCookieTheft" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:D1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of column A-D
$WorkSheet.Cells["A:D"].Style.HorizontalAlignment="Center"
# ConditionalFormatting - Different IP addresses (and User-Agents) indicate Session Cookie Theft
$LastRow = $WorkSheet.Dimension.End.Row
Add-ConditionalFormatting -Address $WorkSheet.Cells["B2:B$LastRow"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '=$B2>=2' -BackgroundColor Red # ClientIP
Add-ConditionalFormatting -Address $WorkSheet.Cells["C2:C$LastRow"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '=$C2>=2' -BackgroundColor Red # OS
Add-ConditionalFormatting -Address $WorkSheet.Cells["D2:D$LastRow"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '=$D2>=2' -BackgroundColor Red # BrowserType
}
}
}
}
# Stats
New-Item "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV" -ItemType Directory -Force | Out-Null
New-Item "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\XLSX" -ItemType Directory -Force | Out-Null
# ClientInfoString (Stats)
$Total = (Import-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv" -Delimiter "," | Select-Object ClientInfoString | Measure-Object).Count
Import-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv" -Delimiter "," -Encoding UTF8 | Group-Object ClientInfoString | Select-Object @{Name='ClientInfoString'; Expression={if($_.Name){$_.Name}else{'N/A'}}},Count,@{Name='PercentUse'; Expression={"{0:p2}" -f ($_.Count / $Total)}} | Sort-Object Count -Descending | Export-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\ClientInfoString.csv" -NoTypeInformation -Encoding UTF8
# XLSX
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\ClientInfoString.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\ClientInfoString.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\ClientInfoString.csv" -Delimiter ","
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\XLSX\ClientInfoString.xlsx" -FreezeTopRow -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "ClientInfoString" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:C1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of columns B-C
$WorkSheet.Cells["B:C"].Style.HorizontalAlignment="Center"
# ConditionalFormatting
Add-ConditionalFormatting -Address $WorkSheet.Cells["A:C"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Client=OWA;Action=ViaProxy",$A1)))' -BackgroundColor Red # AiTM Server
}
}
}
# DeviceProperties (Stats)
$Data = Import-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv" -Delimiter "," | Select-Object DeviceId
$Devices = ($Data | Where-Object {$_.DeviceId -ne '' } | Select-Object DeviceId -Unique | Measure-Object).Count
$Total = ($Data | Measure-Object).Count
Import-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv" -Delimiter "," -Encoding UTF8 | Select-Object DeviceName,DeviceId | Group-Object DeviceName,DeviceId | Select-Object @{Name='DeviceName'; Expression={if($_.Values[0]){$_.Values[0]}else{'N/A'}}},@{Name='DeviceId'; Expression={if($_.Values[1]){$_.Values[0]}else{'N/A'}}},Count,@{Name='PercentUse'; Expression={"{0:p2}" -f ($_.Count / $Total)}} | Sort-Object Count -Descending | Export-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\DeviceProperties.csv" -NoTypeInformation -Encoding UTF8
# XLSX
if (Get-Module -ListAvailable -Name ImportExcel)
{
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\DeviceProperties.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\DeviceProperties.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\DeviceProperties.csv" -Delimiter ","
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\XLSX\DeviceProperties.xlsx" -FreezeTopRow -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "DeviceProperties" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:D1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of column B-D
$WorkSheet.Cells["B:D"].Style.HorizontalAlignment="Center"
}
}
}
}
Write-Output "[Info] $Devices Device Identities found ($Total)"
# Operations (Stats)
# https://learn.microsoft.com/en-us/purview/audit-log-activities
# https://learn.microsoft.com/en-us/purview/ediscovery-search-for-activities-in-the-audit-log
# https://learn.microsoft.com/en-us/entra/identity/monitoring-health/reference-audit-activities
$Total = (Import-Csv -Path "$LogFile" -Delimiter "," | Select-Object Operations | Measure-Object).Count
Import-Csv -Path "$LogFile" -Delimiter "," -Encoding UTF8 | Group-Object Operations | Select-Object @{Name='Operation'; Expression={$_.Name}},Count,@{Name='PercentUse'; Expression={"{0:p2}" -f ($_.Count / $Total)}} | Sort-Object Count -Descending | Export-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\Operation.csv" -NoTypeInformation -Encoding UTF8
$Operations = (Import-Csv -Path "$LogFile" -Delimiter "," -Encoding UTF8 | Select-Object Operations | Sort-Object Operations -Unique | Measure-Object).Count
# XLSX
if (Get-Module -ListAvailable -Name ImportExcel)
{
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\Operation.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\Operation.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\Operation.csv" -Delimiter ","
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\XLSX\Operation.xlsx" -FreezeTopRow -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "Operations" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:C1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of column B-C
$WorkSheet.Cells["B:C"].Style.HorizontalAlignment="Center"
# ConditionalFormatting - New mail box rule
$Cells = "A:C"
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("DeliverToMailboxAndForward",$A1)))' -BackgroundColor Red # M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("ForwardingAddress",$A1)))' -BackgroundColor Red # M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("ForwardingSmtpAddress",$A1)))' -BackgroundColor Red # M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("New-InboxRule",$A1)))' -BackgroundColor Red # PowerShell/API or M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Set-Mailbox",$A1)))' -BackgroundColor Red # M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("UpdateInboxRules",$A1)))' -BackgroundColor Red # Outlook client
# ConditionalFormatting - Modified or Deleted email box rule
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Set-InboxRule",$A1)))' -BackgroundColor Red # PowerShell/API or M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Remove-InboxRule",$A1)))' -BackgroundColor Red # PowerShell/API or M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Enable-InboxRule",$A1)))' -BackgroundColor Red # PowerShell/API or M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Disable-InboxRule",$A1)))' -BackgroundColor Red # PowerShell/API or M365 Portal
# ConditionalFormatting - New transport rule (Microsoft 365 Exchange Transport Rule Creation)
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("New-TransportRule",$A1)))' -BackgroundColor Red # PowerShell/API or M365 Portal
# ConditionalFormatting - Modified or Deleted transport rule (Microsoft 365 Exchange Transport Rule Modification)
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Set-TransportRule",$A1)))' -BackgroundColor Red # PowerShell/API or M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Remove-TransportRule",$A1)))' -BackgroundColor Red # PowerShell/API or M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Enable-TransportRule",$A1)))' -BackgroundColor Red # PowerShell/API or M365 Portal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Disable-TransportRule",$A1)))' -BackgroundColor Red # PowerShell/API or M365 Portal
# ConditionalFormatting - Content Search Abuse
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("SearchStarted",$A1)))' -BackgroundColor Red # Content Search started
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("SearchExportDownloaded",$A1)))' -BackgroundColor Red # Export Content Search
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("ViewedSearchExported",$A1)))' -BackgroundColor Red # A user viewed a content search export in the compliance portal
# ConditionalFormatting - eDiscovery Abuse
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("CaseAdded",$A1)))' -BackgroundColor Red # An eDiscovery case was created
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("New-ComplianceSearch",$A1)))' -BackgroundColor Red # A new content search was created.
# ConditionalFormatting - OAuth Applications
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Add application.",$A1)))' -BackgroundColor Red # Add application
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Add app role assignment grant to user.",$A1)))' -BackgroundColor Red # Adding application permission to an app registration. For example, when you add delegated Graph API permissions.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Add delegated permission grant.",$A1)))' -BackgroundColor Red # API permissions have been delegated to an application.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Add owner to application.",$A1)))' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Add owner to service principal.",$A1)))' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Add service principal.",$A1)))' -BackgroundColor Red # Added service principal
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Consent to application.",$A1)))' -BackgroundColor Red # A user granted authorization to an application to access protected resources on their behalf
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Update application.",$A1)))' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Update application Certificates and secrets management",$A1)))' -BackgroundColor Red # Update application - Certificates and secrets management
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Update service principal.",$A1)))' -BackgroundColor Red
# ConditionalFormatting - Business E-Mail Compromise (BEC)
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Add-MailboxPermission",$A1)))' -BackgroundColor Red # An administrator assigned the FullAccess mailbox permission to a user (known as a delegate) to another person's mailbox. The FullAccess permission allows the delegate to open the other person's mailbox, and read and manage the contents of the mailbox.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Disable-InboxRule",$A1)))' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Enable-InboxRule",$A1)))' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("MoveToDeletedItems",$A1)))' -BackgroundColor Red # Moved messages to Deleted Items folder
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("HardDelete",$A1)))' -BackgroundColor Red # Purged messages from the mailbox
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("SendAs",$A1)))' -BackgroundColor Red # A message was sent using the SendAs permission. This means that another user sent the message as though it came from the mailbox owner.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Set-MailboxJunkEmailConfiguration",$A1)))' -BackgroundColor Red # Bypass spam filters and successfully deliver spoofed messages to a targeted user’s mailbox
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("SoftDelete",$A1)))' -BackgroundColor Red # Deleted messages from Deleted Items folder
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("HygieneTenantEvents",$A1)))' -BackgroundColor Red # Hygiene events are related to outbound spam protection. These events are related to users who are restricted from sending email.
# ConditionalFormatting - SharePoint Auditing
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("AddedToSecureLink",$A1)))' -BackgroundColor Red # A user was added to the list of entities who can use a secure sharing link. A link that only works for specific people was secured to a user.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("SearchQueryPerformed",$A1)))' -BackgroundColor Red # A user performed a search in SharePoint or OneDrive for Business.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("SecureLinkCreated",$A1)))' -BackgroundColor Red # A secure sharing link was created to this item. A link that only works for specific people was created. It's usually followed by a series of AddedToSecureLink operations, which signify the users who were secured to the link.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("SecureLinkUpdated",$A1)))' -BackgroundColor Red # A secure sharing link was updated. A link that only works for specific people was updated.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("SharingInvitationCreated",$A1)))' -BackgroundColor Red # A user shared a resource in SharePoint Online or OneDrive for Business with a user who isn't in your organization's directory.
# ConditionalFormatting - Account Manipulation
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Add user.",$A1)))' -BackgroundColor Red # A user account was created
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Added member to group",$A1)))' -BackgroundColor Red # A member was added to a group
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Added member to role",$A1)))' -BackgroundColor Red # A member was added to a role
# ConditionalFormatting - Power Automate
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("CreateFlow",$A1)))' -BackgroundColor Red # A new flow was created (MicrosoftFlow)
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("PutConnection",$A1)))' -BackgroundColor Red # A connection was created or edited (MicrosoftFlow)
# ConditionalFormatting - Unified Audit Log Retention Policy Manipulation
# Note: UAL are retained for 180 days by default for all plans. However, if you have Office 365 E5, Microsoft 365 E5 or Microsoft 365 E5 Compliance add-on license you can enable an audit retention policy for up to 10 years.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("New-UnifiedAuditLogRetentionPolicy",$A1)))' -BackgroundColor Red # This operation is recorded when a new retention policy is created in the Microsoft 365 Defender portal or the Microsoft Purview compliance portal.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Set-UnifiedAuditLogRetentionPolicy",$A1)))' -BackgroundColor Red # This operation is recorded when an existing retention policy is modified in the Microsoft 365 Defender portal or the Microsoft Purview compliance portal.
Add-ConditionalFormatting -Address $WorkSheet.Cells["$Cells"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Remove-UnifiedAuditLogRetentionPolicy",$A1)))' -BackgroundColor Red # This operation is recorded when an existing retention policy is removed in the Microsoft 365 Defender portal or the Microsoft Purview compliance portal.
}
}
}
}
# RecordType (Stats)
$Total = (Import-Csv -Path "$LogFile" -Delimiter "," | Select-Object "File Path" | Measure-Object).Count
Import-Csv -Path "$LogFile" -Delimiter "," -Encoding UTF8 | Group-Object RecordType | Select-Object @{Name='RecordType'; Expression={$_.Name}},Count,@{Name='PercentUse'; Expression={"{0:p2}" -f ($_.Count / $Total)}} | Sort-Object Count -Descending | Export-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\RecordType.csv" -NoTypeInformation -Encoding UTF8
$RecordTypes = (Import-Csv -Path "$LogFile" -Delimiter "," -Encoding UTF8 | Select-Object RecordType | Sort-Object RecordType -Unique | Measure-Object).Count
# XLSX
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\RecordType.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\RecordType.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\RecordType.csv" -Delimiter ","
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\XLSX\RecordType.xlsx" -FreezeTopRow -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "RecordType" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:C1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of column B-C
$WorkSheet.Cells["B:C"].Style.HorizontalAlignment="Center"
}
}
}
Write-Output "[Info] $RecordTypes RecordTypes and $Operations Operations found"
# RequestType (Stats)
$Total = (Import-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv" -Delimiter "," | Select-Object RequestType | Where-Object {$_.RequestType -ne '' } | Measure-Object).Count
Import-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv" -Delimiter "," | Select-Object RequestType | Where-Object {$_.RequestType -ne '' } | Where-Object {$null -ne ($_.PSObject.Properties | ForEach-Object {$_.Value})} | Group-Object RequestType | Select-Object @{Name='RequestType'; Expression={$_.Name}},Count,@{Name='PercentUse'; Expression={"{0:p2}" -f ($_.Count / $Total)}} | Sort-Object Count -Descending | Export-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\RequestType.csv" -NoTypeInformation -Encoding UTF8
# XLSX
if (Get-Module -ListAvailable -Name ImportExcel)
{
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\RequestType.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\RequestType.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\RequestType.csv" -Delimiter ","
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\XLSX\RequestType.xlsx" -NoHyperLinkConversion * -FreezeTopRow -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "RequestType" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:C1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of column B-C
$WorkSheet.Cells["B:C"].Style.HorizontalAlignment="Center"
}
}
}
}
# RequestTypes --> Type of Authentication (Microsoft Entra Authentication)???
# Cmsi:Cmsi Check My Sign In (CMSI). For security reasons, user confirmation is required for this request. Indicates use of device code auth.
# Consent:Set ???
# Kmsi:kmsi Keep Me Signed In (KMSI) prompt --> Stay signed in?
# Login:login ???
# Login:reprocess This likely indicates that the user's session has expired. When the user attempts to access the application or service again, he is prompted to reauthenticate.
# Login:resume ???
# OAuth2:Authorize ???
# OAuth2:Login* This usually happens when a user is trying to sign into an application that uses Office 365 resources, and the application is requesting to authenticate the user by redirecting them to the OAuth 2.0 login process.
# OAuth2:Token This likely indicates a token request action in the OAuth 2.0 authorization framework. This token is then used to access protected resources on behalf of the user. When an application has successfully authenticated with the user's credentials, it will make a token request to receive an access token that allows it to access the user's resources in Office 365.
# OrgIdWsTrust2:process ???
# PermitSso:PermitSso ???
# Saml2:processrequest ???
# SAS:BeginAuth ???
# SAS:EndAuth ???
# SAS:ProcessAuth ???
# SSPR:end ???
# WindowsAuthenticationControllerusernamemixed ???
# WindowsAuthewnticationControllerwindowstransport ???
# WsFederation:wsfederation ???
# EndpointCall (AADSignInEventsBeta)
# Information about the AAD endpoint that the request was sent to and the type of request sent during sign in.
# User-Agent (Stats)
$Total = (Import-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv" -Delimiter "," | Select-Object UserAgent | Where-Object {$_.UserAgent -ne '' } | Measure-Object).Count
Import-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\CSV\Custom.csv" -Delimiter "," | Select-Object UserAgent | Where-Object {$_.UserAgent -ne '' } | Where-Object {$null -ne ($_.PSObject.Properties | ForEach-Object {$_.Value})} | Group-Object UserAgent | Select-Object @{Name='UserAgent'; Expression={$_.Name}},Count,@{Name='PercentUse'; Expression={"{0:p2}" -f ($_.Count / $Total)}} | Sort-Object Count -Descending | Export-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\UserAgent.csv" -NoTypeInformation -Encoding UTF8
# XLSX
if (Get-Module -ListAvailable -Name ImportExcel)
{
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\UserAgent.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\UserAgent.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\CSV\UserAgent.csv" -Delimiter ","
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Stats\XLSX\UserAgent.xlsx" -FreezeTopRow -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "UserAgent" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:C1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of column B-C
$WorkSheet.Cells["B:C"].Style.HorizontalAlignment="Center"
}
}
}
}
# Suspicious Operations
# Inbox Rules
# Inbox Rules let users automate actions on incoming emails when they match specific criteria, such as containing certain words in the subject line or coming from a particular sender.
# These actions can include moving messages to designated folders, marking them as read, or forwarding them to external addresses.
# New-InboxRule
# RecordType: ExchangeAdmin
# Operation: New-InboxRule --> Create a new Inbox Rule in a mailbox
# https://learn.microsoft.com/en-us/powershell/module/exchange/new-inboxrule?view=exchange-ps
# Hide Artifacts: Email Hiding Rules [T1564.008] --> https://attack.mitre.org/techniques/T1564/008/
$Import = Import-Csv -Path "$LogFile" -Delimiter "," -Encoding UTF8 | Where-Object { $_.RecordType -eq "ExchangeAdmin" } | Where-Object { $_.Operations -eq "New-InboxRule" } | Sort-Object { $_.CreationDate -as [datetime] } -Descending
$Count = [string]::Format('{0:N0}',($Import | Measure-Object).Count)
if ($Count -gt 0)
{
Write-Host "[Alert] Suspicious Operation(s) detected: New-InboxRule ($Count)" -ForegroundColor Red
New-Item "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\CSV" -ItemType Directory -Force | Out-Null
New-Item "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\XLSX" -ItemType Directory -Force | Out-Null
# CSV
$Import | Select-Object @{Name="CreationDate";Expression={([DateTime]::ParseExact($_.CreationDate, "$TimestampFormat", [cultureinfo]::InvariantCulture).ToString("yyyy-MM-dd HH:mm:ss"))}},UserIds,RecordType,Operations,AuditData,ResultIndex,ResultCount,Identity,IsValid,ObjectState | Export-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\CSV\New-InboxRule.csv" -NoTypeInformation -Encoding UTF8
# XLSX
if (Get-Module -ListAvailable -Name ImportExcel)
{
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\CSV\New-InboxRule.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\CSV\New-InboxRule.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\CSV\New-InboxRule.csv" -Delimiter ","
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\XLSX\New-InboxRule.xlsx" -FreezePane 2,2 -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "New-InboxRule" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:J1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of columns A-D and F-J
$WorkSheet.Cells["A:D"].Style.HorizontalAlignment="Center"
$WorkSheet.Cells["F:J"].Style.HorizontalAlignment="Center"
# ConditionalFormatting
Add-ConditionalFormatting -Address $WorkSheet.Cells["C:D"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("New-InboxRule",$D1)))' -BackgroundColor Red
}
}
}
}
# AuditData
# CSV
$Results = [Collections.Generic.List[PSObject]]::new()
ForEach($Record in $Import)
{
$AuditData = $Record.AuditData | ConvertFrom-Json
$Parameters = $AuditData.Parameters
# Parameters
New-Item "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\TXT" -ItemType Directory -Force | Out-Null
$Parameters | Out-File "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\TXT\New-InboxRule_Parameters.txt" -Append
$Line = [PSCustomObject]@{
"CreationDate" = $Record.CreationDate
"Id" = $AuditData.Id
"RecordType" = $Record.RecordType
"Operation" = $AuditData.Operation
"OrganizationId" = $AuditData.OrganizationId
"RecordType_AuditData" = $AuditData.RecordType
"ResultStatus" = $AuditData.ResultStatus
"UserKey" = $AuditData.UserKey
"UserType" = $AuditData.UserType
"Version" = $AuditData.Version
"Workload" = $AuditData.Workload
"ClientIP" = $AuditData.ClientIP
"ObjectId" = $AuditData.ObjectId
"UserId" = $AuditData.UserId
"AppId" = $AuditData.AppId
"ClientAppId" = $AuditData.ClientAppId
"ExternalAccess" = $AuditData.ExternalAccess
"OrganizationName" = $AuditData.OrganizationName
"OriginatingServer" = $AuditData.OriginatingServer
"AlwaysDeleteOutlookRulesBlob" = $Parameters | Where-Object { $_.Name -eq "AlwaysDeleteOutlookRulesBlob" } | Select-Object -ExpandProperty Value
"DeleteMessage" = $Parameters | Where-Object { $_.Name -eq "DeleteMessage" } | Select-Object -ExpandProperty Value # Hiding
"Force" = $Parameters | Where-Object { $_.Name -eq "Force" } | Select-Object -ExpandProperty Value
"From" = $Parameters | Where-Object { $_.Name -eq "From" } | Select-Object -ExpandProperty Value # Monitoring
"MoveToFolder" = $Parameters | Where-Object { $_.Name -eq "MoveToFolder" } | Select-Object -ExpandProperty Value # Hiding
"Name" = $Parameters | Where-Object { $_.Name -eq "Name" } | Select-Object -ExpandProperty Value
"FromAddressContainsWords" = $Parameters | Where-Object { $_.Name -eq "FromAddressContainsWords" } | Select-Object -ExpandProperty Value # Monitoring
"MyNameInToOrCcBox" = $Parameters | Where-Object { $_.Name -eq "MyNameInToOrCcBox" } | Select-Object -ExpandProperty Value # Hiding
"SubjectContainsWords" = $Parameters | Where-Object { $_.Name -eq "SubjectContainsWords" } | Select-Object -ExpandProperty Value # Monitoring
"MarkAsRead" = $Parameters | Where-Object { $_.Name -eq "MarkAsRead" } | Select-Object -ExpandProperty Value # Hiding
"StopProcessingRules" = $Parameters | Where-Object { $_.Name -eq "StopProcessingRules" } | Select-Object -ExpandProperty Value
"SessionId" = ($AuditData | Select-Object SessionId).SessionId
}
$Results.Add($Line)
}
$Results | Export-Csv -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\CSV\New-InboxRule_AuditData.csv" -NoTypeInformation -Encoding UTF8
# XLSX
if (Get-Module -ListAvailable -Name ImportExcel)
{
if (Test-Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\CSV\New-InboxRule_AuditData.csv")
{
if([int](& $xsv count -d "," "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\CSV\New-InboxRule_AuditData.csv") -gt 0)
{
$IMPORT = Import-Csv "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\CSV\New-InboxRule_AuditData.csv" -Delimiter ","
$IMPORT | Export-Excel -Path "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\XLSX\New-InboxRule_AuditData.xlsx" -FreezePane 2,5 -BoldTopRow -AutoSize -AutoFilter -WorkSheetname "New-InboxRule" -CellStyleSB {
param($WorkSheet)
# BackgroundColor and FontColor for specific cells of TopRow
$BackgroundColor = [System.Drawing.Color]::FromArgb(50,60,220)
Set-Format -Address $WorkSheet.Cells["A1:AE1"] -BackgroundColor $BackgroundColor -FontColor White
# HorizontalAlignment "Center" of columns A-AE
$WorkSheet.Cells["A:AE"].Style.HorizontalAlignment="Center"
# ConditionalFormatting - New-InboxRule
Add-ConditionalFormatting -Address $WorkSheet.Cells["C:D"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("New-InboxRule",$D1)))' -BackgroundColor Red
# ConditionalFormatting - DeleteMessage
Add-ConditionalFormatting -Address $WorkSheet.Cells["U:U"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("True",$U1)))' -BackgroundColor Red
# ConditionalFormatting - MoveToFolder
Add-ConditionalFormatting -Address $WorkSheet.Cells["X:X"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Archive",$X1)))' -BackgroundColor Red # English
Add-ConditionalFormatting -Address $WorkSheet.Cells["X:X"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Conversation History",$X1)))' -BackgroundColor Red # English
Add-ConditionalFormatting -Address $WorkSheet.Cells["X:X"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Historial de conversaciones",$X1)))' -BackgroundColor Red # Spanish
Add-ConditionalFormatting -Address $WorkSheet.Cells["X:X"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("RSS-подписки",$X1)))' -BackgroundColor Red # Russian
Add-ConditionalFormatting -Address $WorkSheet.Cells["X:X"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("RSS-Feeds",$X1)))' -BackgroundColor Red # English
Add-ConditionalFormatting -Address $WorkSheet.Cells["X:X"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("RSS Subscriptions",$X1)))' -BackgroundColor Red # English
Add-ConditionalFormatting -Address $WorkSheet.Cells["X:X"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("RSS-feeder",$X1)))' -BackgroundColor Red # Norwegian
Add-ConditionalFormatting -Address $WorkSheet.Cells["X:X"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("RSS-syötteet",$X1)))' -BackgroundColor Red # Finnish
Add-ConditionalFormatting -Address $WorkSheet.Cells["X:X"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("Junk-E-Mail",$X1)))' -BackgroundColor Red # English
# ConditionalFormatting - MarkAsRead
Add-ConditionalFormatting -Address $WorkSheet.Cells["AC:AC"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("True",$AC1)))' -BackgroundColor Red
# ConditionalFormatting - Name
Add-ConditionalFormatting -Address $WorkSheet.Cells["Y:Y"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '$Y1="."' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["Y:Y"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '$Y1=";"' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["Y:Y"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '$Y1="|"' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["Y:Y"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '$Y1=".."' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["Y:Y"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '$Y1="..."' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["Y:Y"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '$Y1=".;"' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["Y:Y"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '$Y1=".,"' -BackgroundColor Red
Add-ConditionalFormatting -Address $WorkSheet.Cells["Y:Y"] -WorkSheet $WorkSheet -RuleType 'Expression' -ConditionValue '$Y1=".,.,"' -BackgroundColor Red
# ConditionalFormatting - StopProcessingRules
Add-ConditionalFormatting -Address $WorkSheet.Cells["AD:AD"] -WorkSheet $WorkSheet -RuleType 'Expression' 'NOT(ISERROR(FIND("True",$AD1)))' -BackgroundColor Red
}
}
}
}
}
# Set-InboxRule
# RecordType: ExchangeAdmin
# Operation: Set-InboxRule --> Change an existing mailbox, often used for setting up forwarding rules
# The Set-InboxRule cmdlet allows you to modify the rule conditions, exceptions, and actions. When you create, modify, remove, enable, or disable an Inbox rule in Exchange PowerShell, any client-side rules created by Microsoft Outlook are removed.
# https://learn.microsoft.com/en-us/powershell/module/exchange/set-inboxrule?view=exchange-ps
$Import = Import-Csv -Path "$LogFile" -Delimiter "," -Encoding UTF8 | Where-Object { $_.RecordType -eq "ExchangeAdmin" } | Where-Object { $_.Operations -eq "Set-InboxRule" } | Sort-Object { $_.CreationDate -as [datetime] } -Descending
$Count = [string]::Format('{0:N0}',($Import | Measure-Object).Count)
if ($Count -gt 0)
{
Write-Host "[Alert] Suspicious Operation(s) detected: Set-InboxRule ($Count)" -ForegroundColor Red
New-Item "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\CSV" -ItemType Directory -Force | Out-Null
New-Item "$OUTPUT_FOLDER\UnifiedAuditLogs\Suspicious-Operations\XLSX" -ItemType Directory -Force | Out-Null