mirror of
https://github.com/hakril/PythonForWindows
synced 2026-06-08 14:31:45 +00:00
Clement Rouault
317 lines
12 KiB
Python
317 lines
12 KiB
Python
import struct
|
|
import ctypes
|
|
import os
|
|
|
|
import windows
|
|
import windows.utils as utils
|
|
|
|
from .native_exec import simple_x86 as x86
|
|
from .native_exec import simple_x64 as x64
|
|
|
|
from windows.native_exec.nativeutils import GetProcAddress64, GetProcAddress32
|
|
|
|
from windows.dbgprint import dbgprint
|
|
|
|
|
|
def perform_manual_getproc_loadlib_32(target, dll_name):
|
|
dll = "KERNEL32.DLL\x00".encode("utf-16-le")
|
|
api = "LoadLibraryA\x00"
|
|
dll_to_load = dll_name + "\x00"
|
|
|
|
RemoteManualLoadLibray = x86.MultipleInstr()
|
|
code = RemoteManualLoadLibray
|
|
code += x86.Mov("ECX", x86.mem("[ESP + 4]"))
|
|
code += x86.Push(x86.mem("[ECX + 4]"))
|
|
code += x86.Push(x86.mem("[ECX]"))
|
|
code += x86.Call(":FUNC_GETPROCADDRESS32")
|
|
code += x86.Push(x86.mem("[ECX + 8]"))
|
|
code += x86.Call("EAX") # LoadLibrary
|
|
code += x86.Pop("ECX")
|
|
code += x86.Pop("ECX")
|
|
code += x86.Ret()
|
|
|
|
RemoteManualLoadLibray += GetProcAddress32
|
|
|
|
with target.allocated_memory(0x1000) as addr:
|
|
addr2 = addr + len(dll)
|
|
addr3 = addr2 + len(api)
|
|
addr4 = addr3 + len(dll_to_load)
|
|
|
|
target.write_memory(addr, dll)
|
|
target.write_memory(addr2, api)
|
|
target.write_memory(addr3, dll_to_load)
|
|
target.write_qword(addr4, addr)
|
|
target.write_qword(addr4 + 4, addr2)
|
|
target.write_qword(addr4 + 0x8, addr3)
|
|
|
|
t = target.execute(RemoteManualLoadLibray.get_code(), addr4)
|
|
t.wait()
|
|
return True
|
|
|
|
def perform_manual_getproc_loadlib_64(target, dll_name):
|
|
dll = "KERNEL32.DLL\x00".encode("utf-16-le")
|
|
api = "LoadLibraryA\x00"
|
|
dll_to_load = dll_name + "\x00"
|
|
|
|
RemoteManualLoadLibray = x64.MultipleInstr()
|
|
code = RemoteManualLoadLibray
|
|
code += x64.Mov("R15", "RCX")
|
|
code += x64.Mov("RCX", x64.mem("[R15 + 0]"))
|
|
code += x64.Mov("RDX", x64.mem("[R15 + 8]"))
|
|
code += x64.Call(":FUNC_GETPROCADDRESS64")
|
|
code += x64.Mov("RCX", x64.mem("[R15 + 0x10]"))
|
|
code += x64.Push("RCX")
|
|
code += x64.Push("RCX")
|
|
code += x64.Push("RCX")
|
|
code += x64.Call("RAX") # LoadLibrary
|
|
code += x64.Pop("RCX")
|
|
code += x64.Pop("RCX")
|
|
code += x64.Pop("RCX")
|
|
code += x64.Ret()
|
|
|
|
RemoteManualLoadLibray += GetProcAddress64
|
|
|
|
with target.allocated_memory(0x1000) as addr:
|
|
addr2 = addr + len(dll)
|
|
addr3 = addr2 + len(api)
|
|
addr4 = addr3 + len(dll_to_load)
|
|
|
|
target.write_memory(addr, dll)
|
|
target.write_memory(addr2, api)
|
|
target.write_memory(addr3, dll_to_load)
|
|
target.write_qword(addr4, addr)
|
|
target.write_qword(addr4 + 8, addr2)
|
|
target.write_qword(addr4 + 0x10, addr3)
|
|
|
|
t = target.execute(RemoteManualLoadLibray.get_code(), addr4)
|
|
t.wait()
|
|
return True
|
|
|
|
|
|
def load_dll_in_remote_process(target, dll_name):
|
|
rpeb = target.peb
|
|
if rpeb.Ldr:
|
|
# LDR est parcourable, ca va etre deja plus simple..
|
|
modules = rpeb.modules
|
|
if any(mod.name == dll_name for mod in modules):
|
|
# DLL already loaded
|
|
dbgprint("DLL already present in target", "DLLINJECT")
|
|
return True
|
|
k32 = [mod for mod in modules if mod.name.lower() == "kernel32.dll"]
|
|
if k32:
|
|
# We have kernel32 \o/
|
|
k32 = k32[0]
|
|
try:
|
|
load_libraryA = k32.pe.exports["LoadLibraryA"]
|
|
except KeyError:
|
|
raise ValueError("Kernel32 have no export <LoadLibraryA> (wtf)")
|
|
|
|
with target.allocated_memory(0x1000) as addr:
|
|
target.write_memory(addr, dll_name + "\x00")
|
|
t = target.create_thread(load_libraryA, addr)
|
|
t.wait()
|
|
dbgprint("DLL Injected via LoadLibray", "DLLINJECT")
|
|
return True
|
|
# Hardcore mode
|
|
# We don't have k32 or PEB->Ldr
|
|
# Go inject a GetProcAddress(LoadLib) + LoadLib shellcode :D
|
|
if target.bitness == 32:
|
|
return perform_manual_getproc_loadlib_32(target, dll_name)
|
|
return perform_manual_getproc_loadlib_64(target, dll_name)
|
|
|
|
python_function_32_bits = {}
|
|
# 32 to 32 injection
|
|
def generate_python_exec_shellcode_32(target, PYCODE_ADDR, PyDll):
|
|
if not python_function_32_bits:
|
|
pymodule = [mod for mod in target.peb.modules if mod.name == PyDll][0]
|
|
Py_exports = pymodule.pe.exports
|
|
python_function_32_bits["PyEval_InitThreads"] = Py_exports["PyEval_InitThreads"]
|
|
python_function_32_bits["Py_IsInitialized"] = Py_exports["Py_IsInitialized"]
|
|
python_function_32_bits["PyGILState_Release"] = Py_exports["PyGILState_Release"]
|
|
python_function_32_bits["PyGILState_Ensure"] = Py_exports["PyGILState_Ensure"]
|
|
python_function_32_bits["PyEval_SaveThread"] = Py_exports["PyEval_SaveThread"]
|
|
python_function_32_bits["Py_Initialize"] = Py_exports["Py_Initialize"]
|
|
python_function_32_bits["PyRun_SimpleString"] = Py_exports["PyRun_SimpleString"]
|
|
Py_exports = python_function_32_bits
|
|
PyEval_InitThreads = Py_exports["PyEval_InitThreads"]
|
|
Py_IsInitialized = Py_exports["Py_IsInitialized"]
|
|
PyGILState_Release = Py_exports["PyGILState_Release"]
|
|
PyGILState_Ensure = Py_exports["PyGILState_Ensure"]
|
|
PyEval_SaveThread = Py_exports["PyEval_SaveThread"]
|
|
Py_Initialize = Py_exports["Py_Initialize"]
|
|
PyRun_SimpleString = Py_exports["PyRun_SimpleString"]
|
|
|
|
code = x86.MultipleInstr()
|
|
code += x86.Mov('EAX', Py_IsInitialized)
|
|
code += x86.Call('EAX')
|
|
code += x86.Mov("EDI", "EAX")
|
|
code += x86.Cmp("EAX", 0)
|
|
code += x86.Jnz(":DO_ENSURE")
|
|
# Python Initilisation code
|
|
# init multithread (for other injection)
|
|
code += x86.Mov('EAX', PyEval_InitThreads)
|
|
code += x86.Call('EAX')
|
|
code += x86.Mov('EAX', Py_Initialize)
|
|
code += x86.Call('EAX')
|
|
code += x86.Label(":DO_ENSURE")
|
|
code += x86.Mov('EAX', PyGILState_Ensure)
|
|
code += x86.Call('EAX')
|
|
code += x86.Push('EAX')
|
|
code += x86.Push(PYCODE_ADDR)
|
|
code += x86.Mov('EAX', PyRun_SimpleString)
|
|
code += x86.Call('EAX')
|
|
code += x86.Mov("ESI", "EAX")
|
|
code += x86.Mov('EAX', PyGILState_Release)
|
|
code += x86.Call('EAX')
|
|
code += x86.Pop('EAX')
|
|
code += x86.Cmp("EDI", 0)
|
|
code += x86.Jnz(":RETURN")
|
|
# If PyEval_InitThreads was called (init done in this thread)
|
|
# We must release the GIL
|
|
code += x86.Mov('EAX', PyEval_SaveThread)
|
|
code += x86.Call('EAX')
|
|
code += x86.Label(":RETURN")
|
|
code += x86.Mov("EAX", "ESI")
|
|
code += x86.Pop("EDI")
|
|
code += x86.Ret()
|
|
return code.get_code()
|
|
|
|
|
|
python_function_64_bits = {}
|
|
# 64 to 64 injection
|
|
def generate_python_exec_shellcode_64(target, PYCODE_ADDR, PyDll):
|
|
if not python_function_64_bits:
|
|
pymodule = [mod for mod in target.peb.modules if mod.name == PyDll][0]
|
|
Py_exports = pymodule.pe.exports
|
|
python_function_64_bits["PyEval_InitThreads"] = Py_exports["PyEval_InitThreads"]
|
|
python_function_64_bits["Py_IsInitialized"] = Py_exports["Py_IsInitialized"]
|
|
python_function_64_bits["PyGILState_Release"] = Py_exports["PyGILState_Release"]
|
|
python_function_64_bits["PyGILState_Ensure"] = Py_exports["PyGILState_Ensure"]
|
|
python_function_64_bits["PyEval_SaveThread"] = Py_exports["PyEval_SaveThread"]
|
|
python_function_64_bits["Py_Initialize"] = Py_exports["Py_Initialize"]
|
|
python_function_64_bits["PyRun_SimpleString"] = Py_exports["PyRun_SimpleString"]
|
|
Py_exports = python_function_64_bits
|
|
PyEval_InitThreads = Py_exports["PyEval_InitThreads"]
|
|
Py_IsInitialized = Py_exports["Py_IsInitialized"]
|
|
PyGILState_Release = Py_exports["PyGILState_Release"]
|
|
PyGILState_Ensure = Py_exports["PyGILState_Ensure"]
|
|
PyEval_SaveThread = Py_exports["PyEval_SaveThread"]
|
|
Py_Initialize = Py_exports["Py_Initialize"]
|
|
PyRun_SimpleString = Py_exports["PyRun_SimpleString"]
|
|
|
|
Reserve_space_for_call = x64.MultipleInstr([x64.Push('RDI')] * 4)
|
|
Clean_space_for_call = x64.MultipleInstr([x64.Pop('RDI')] * 4)
|
|
code = x64.MultipleInstr()
|
|
# Do stack alignement
|
|
code += x64.Push('RCX')
|
|
code += Reserve_space_for_call
|
|
code += x64.Mov('RAX', Py_IsInitialized)
|
|
code += x64.Call('RAX')
|
|
code += x64.Mov("RDI", "RAX")
|
|
code += x64.Cmp("RAX", 0)
|
|
code += x64.Jnz(":DO_ENSURE")
|
|
code += x64.Mov('RAX', PyEval_InitThreads)
|
|
code += x64.Call('RAX')
|
|
code += x64.Mov('RAX', Py_Initialize)
|
|
code += x64.Call('RAX')
|
|
code += x64.Label(":DO_ENSURE")
|
|
code += x64.Mov('RAX', PyGILState_Ensure)
|
|
code += x64.Call('RAX')
|
|
code += x64.Mov('R15', 'RAX')
|
|
code += x64.Mov('RAX', PyRun_SimpleString)
|
|
code += x64.Mov('RCX', PYCODE_ADDR)
|
|
code += x64.Call('RAX')
|
|
code += x64.Mov('RCX', 'R15')
|
|
code += x64.Mov('R15', 'RAX')
|
|
code += x64.Mov('RAX', PyGILState_Release)
|
|
code += x64.Call('RAX')
|
|
code += x64.Cmp("RDI", 0)
|
|
code += x64.Jnz(":RETURN")
|
|
# If PyEval_InitThreads was called (init done in this thread)
|
|
# We must release the GIL
|
|
code += x64.Mov('RAX', PyEval_SaveThread)
|
|
code += x64.Call('RAX')
|
|
code += x64.Label(":RETURN")
|
|
code += Clean_space_for_call
|
|
# Remove stack alignement
|
|
code += x64.Pop('RCX')
|
|
code += x64.Mov("RAX", "R15")
|
|
code += x64.Ret()
|
|
return code.get_code()
|
|
|
|
|
|
def inject_python_command(target, code_injected, PYDLL):
|
|
"""Postulate: PYDLL is already loaded in target process"""
|
|
PYCODE = code_injected + "\x00"
|
|
# TODO: free this (how ? when ?)
|
|
remote_addr = target.virtual_alloc(len(PYCODE) + 0x100)
|
|
target.write_memory(remote_addr, PYCODE)
|
|
SHELLCODE_ADDR = remote_addr + len(PYCODE)
|
|
|
|
if target.bitness == 32:
|
|
shellcode_generator = generate_python_exec_shellcode_32
|
|
else:
|
|
shellcode_generator = generate_python_exec_shellcode_64
|
|
|
|
shellcode = shellcode_generator(target, remote_addr, PYDLL)
|
|
target.write_memory(SHELLCODE_ADDR, shellcode)
|
|
return SHELLCODE_ADDR
|
|
|
|
|
|
def validate_python_dll_presence_on_disk(process):
|
|
if windows.current_process.bitness == process.bitness:
|
|
return True
|
|
if windows.current_process.bitness == 32 and process.bitness == 64:
|
|
with windows.utils.DisableWow64FsRedirection():
|
|
if not os.path.exists(r"C:\Windows\system32\python27.dll"):
|
|
raise ValueError("Could not find Python DLL to inject")
|
|
return True
|
|
if windows.current_process.bitness == 64 and process.bitness == 32:
|
|
if not os.path.exists(r"C:\Windows\SysWOW64\python27.dll"):
|
|
raise ValueError("Could not find Python DLL to inject")
|
|
return True
|
|
raise NotImplementedError("Unknown bitness")
|
|
|
|
def execute_python_code(process, code):
|
|
validate_python_dll_presence_on_disk(process)
|
|
load_dll_in_remote_process(process, "python27.dll")
|
|
addr = inject_python_command(process, code, "python27.dll")
|
|
t = process.create_thread(addr, 0)
|
|
return t
|
|
|
|
|
|
retrieve_exc = r"""
|
|
import traceback
|
|
import sys
|
|
addr = {0}
|
|
txt = "".join(traceback.format_exception(sys.last_type, sys.last_value, sys.last_traceback))
|
|
import ctypes
|
|
|
|
size = ctypes.c_uint.from_address(addr)
|
|
size.value = len(txt)
|
|
buff = (ctypes.c_char * len(txt)).from_address(addr + ctypes.sizeof(ctypes.c_uint))
|
|
buff[:] = txt
|
|
"""
|
|
|
|
def retrieve_last_exception_data(process):
|
|
with process.allocated_memory(0x1000) as mem:
|
|
execute_python_code(process, retrieve_exc.format(mem))
|
|
size = struct.unpack("<I", process.read_memory(mem, ctypes.sizeof(ctypes.c_uint)))[0]
|
|
data = process.read_memory(mem + ctypes.sizeof(ctypes.c_uint), size)
|
|
return data
|
|
|
|
class RemotePythonError(Exception):
|
|
pass
|
|
|
|
def safe_execute_python(process, code):
|
|
t = execute_python_code(process, code)
|
|
t.wait() # Wait terminaison of the thread
|
|
if t.exit_code == 0:
|
|
return True
|
|
if t.exit_code != 0xffffffff:
|
|
raise ValueError("Unknown exit code {0}".format(hex(t.exit_code)))
|
|
data = retrieve_last_exception_data(process)
|
|
raise RemotePythonError(data)
|
|
|
|
|