我正在尝试使用 Python 的 Ctypes 执行 DLL 注入(inject)。我将 Olly 附加到我尝试注入(inject)的进程,而我尝试创建的线程给出错误“ERROR_INVALID_PARAMETER 00000057”。我一直在做一些研究,我发现当我调用 CreateRemoteThread 时,错误表明我的参数之一是错误的。我似乎无法弄清楚哪个参数是错误的,因为我发送的所有值似乎都有效。我在对 LoadLibrary 的调用上设置了 Olly 条件断点,并且 dll 名称和(完整)路径是正确的。我也没有看到我的自定义 dll 加载到进程的内存空间中(在 Olly 中)。我想知道当我将它们作为参数发送时,这是否与我的 dll 和路径是 unicode 有关。尽管 LoadLibrary 上的条件断点显示了正确的名称和路径。我还设置了 argtype,据我了解,如果类型错误,则会抛出错误,并且会在可能的情况下尝试将其转换为正确的类型。
import sys
from ctypes import *
from ctypes import wintypes
import ctypes
BYTE = c_ubyte
WORD = c_ushort
DWORD = c_ulong
LPBYTE = POINTER(c_ubyte)
LPTSTR = POINTER(c_char)
HANDLE = c_void_p
PVOID = c_void_p
LPVOID = c_void_p
UNIT_PTR = c_ulong
SIZE_T = c_ulong
LPTHREAD_START_ROUTINE = c_void_p
class SECURITY_ATTRIBUTES(ctypes.Structure):
_fields_ = [("nLength", DWORD),
("lpSecurityDescriptor", LPVOID),
("bInheritHandle", wintypes.BOOL)]
LPSECURITY_ATTRIBUTES = POINTER(SECURITY_ATTRIBUTES)
kernel32.CreateRemoteThread.retype = wintypes.HANDLE
kernel32.CreateRemoteThread.argtypes = [wintypes.HANDLE, LPSECURITY_ATTRIBUTES, ctypes.c_size_t, LPTHREAD_START_ROUTINE, wintypes.LPVOID, wintypes.DWORD, wintypes.LPDWORD]
pid = sys.argv[1]
dll_path = sys.argv[2] #'myDLL.dll'
dll_len = len(dll_path) * 2 #Multiplied by 2 so it would take into account the unicode characters
h_process = kernel32.OpenProcess( PROCESS_ALL_ACCESS, False, int(pid))
arg_address = kernel32.VirtualAllocEx(h_process, 0, dll_len, VIRTUAL_MEM, PAGE_READWRITE)
written = c_ubyte(0)
bSuccess = kernel32.WriteProcessMemory(h_process, arg_address, dll_path, dll_len, byref(written))
h_kernel32 = kernel32.GetModuleHandleW('kernel32.dll')
h_loadlib = kernel32.GetProcAddress(h_kernel32, b"LoadLibraryW")
thread_id = c_ulong(0)
h_thread = kernel32.CreateRemoteThread(h_process, #404
None,
0,
h_loadlib, #0x770a0000
arg_address, #0x770eef42
0,
byref(thread_id))
h_threadError = GetLastError() #This says ERROR 0 - Operation completed Successfully
h_dllToHook = kernel32.GetModuleHandleW('myDLL.dll') #h_dllToHook returns '0'
error = GetLastError() #This says ERORR 0 - Operation completed Successfully
另一个奇怪的事情是我注入(inject)的可执行文件是一个控制台应用程序并打印一些内容。我注入(inject)的 dll 有一个从 DLLMAIN 调用的导出函数,该函数也打印出内容。当我检查控制台时,它似乎成功运行,因为注入(inject)的 DLL 中的内容也被打印出来。此外,当我在 CreateRemoteThread 上放置条件日志记录断点时,它永远不会被命中。所以我的问题是它是否成功注入(inject),因为看起来是 1) 为什么我不能使用 GetModuleHandleW 获取注入(inject)的 DLL 的句柄,2) 为什么 Ollydbg 不显示注入(inject)的 DLL 没有映射到进程中' 内存空间。我正在单步执行我的代码并进行中断,因此线程不像正在运行并退出。我已经研究了一段时间,所以非常感谢任何帮助!谢谢。
最佳答案
- 使用
ctypes.get_last_error
而不是GetLastError
。这需要use_last_error
选项,例如WinDLL('kernel32.dll', use_last_error=True)
。 GetModuleHandleW
和GetProcAddress
步骤是不必要的。 ctypes 已经为你做到了这一点。只需使用kernel32.LoadLibraryW即可。这取决于 kernel32.dll 在每个进程中始终映射到相同的基地址,我认为这对于现有版本的 Windows 来说是正确的。- 一般来说,复制字符串时应考虑空终止符,例如使用
len(dll_path) + 1
。在这种情况下,您将提交一个新的内存页(在 x86 和 x64 系统上为 4 KiB),该内存页最初全为零。 - 我不确定您如何定义
VIRTUAL_MEM
分配类型。这包括MEM_COMMIT
吗? - 注意拼写错误。您为
CreateRemoteThread
的原型(prototype)编写了retype
而不是restype
,这意味着返回值仍然是默认的 32 位 Cint
。
以下内容对我有用,将 DLL 加载到 Python 进程中。
dllinject.py(ctypes 定义):
import ctypes
from ctypes import wintypes
kernel32 = ctypes.WinDLL('kernel32.dll', use_last_error=True)
PROCESS_VM_OPERATION = 0x0008
PROCESS_VM_WRITE = 0x0020
PROCESS_CREATE_THREAD = 0x0002
MEM_COMMIT = 0x1000
MEM_RELEASE = 0x8000
PAGE_READWRITE = 0x0004
INFINITE = -1
SIZE_T = ctypes.c_size_t
LPSIZE_T = ctypes.POINTER(SIZE_T)
WCHAR_SIZE = ctypes.sizeof(wintypes.WCHAR)
LPSECURITY_ATTRIBUTES = wintypes.LPVOID
LPTHREAD_START_ROUTINE = wintypes.LPVOID
class BOOL_CHECKED(ctypes._SimpleCData):
_type_ = "l"
def _check_retval_(retval):
if retval == 0:
raise ctypes.WinError(ctypes.get_last_error())
return retval
class LPVOID_CHECKED(ctypes._SimpleCData):
_type_ = "P"
def _check_retval_(retval):
if retval is None:
raise ctypes.WinError(ctypes.get_last_error())
return retval
HANDLE_CHECKED = LPVOID_CHECKED # not file handles
kernel32.OpenProcess.restype = HANDLE_CHECKED
kernel32.OpenProcess.argtypes = (
wintypes.DWORD, # dwDesiredAccess
wintypes.BOOL, # bInheritHandle
wintypes.DWORD) # dwProcessId
kernel32.VirtualAllocEx.restype = LPVOID_CHECKED
kernel32.VirtualAllocEx.argtypes = (
wintypes.HANDLE, # hProcess
wintypes.LPVOID, # lpAddress
SIZE_T, # dwSize
wintypes.DWORD, # flAllocationType
wintypes.DWORD) # flProtect
kernel32.VirtualFreeEx.argtypes = (
wintypes.HANDLE, # hProcess
wintypes.LPVOID, # lpAddress
SIZE_T, # dwSize
wintypes.DWORD) # dwFreeType
kernel32.WriteProcessMemory.restype = BOOL_CHECKED
kernel32.WriteProcessMemory.argtypes = (
wintypes.HANDLE, # hProcess
wintypes.LPVOID, # lpBaseAddress
wintypes.LPCVOID, # lpBuffer
SIZE_T, # nSize
LPSIZE_T) # lpNumberOfBytesWritten _Out_
kernel32.CreateRemoteThread.restype = HANDLE_CHECKED
kernel32.CreateRemoteThread.argtypes = (
wintypes.HANDLE, # hProcess
LPSECURITY_ATTRIBUTES, # lpThreadAttributes
SIZE_T, # dwStackSize
LPTHREAD_START_ROUTINE, # lpStartAddress
wintypes.LPVOID, # lpParameter
wintypes.DWORD, # dwCreationFlags
wintypes.LPDWORD) # lpThreadId _Out_
kernel32.WaitForSingleObject.argtypes = (
wintypes.HANDLE, # hHandle
wintypes.DWORD) # dwMilliseconds
kernel32.CloseHandle.argtypes = (
wintypes.HANDLE,) # hObject
dllinject.py(injectdll
):
def injectdll(pid, dllpath):
size = (len(dllpath) + 1) * WCHAR_SIZE
hproc = hthrd = addr = None
try:
hproc = kernel32.OpenProcess(
PROCESS_CREATE_THREAD | PROCESS_VM_OPERATION |
PROCESS_VM_WRITE, False, pid)
addr = kernel32.VirtualAllocEx(
hproc, None, size, MEM_COMMIT, PAGE_READWRITE)
kernel32.WriteProcessMemory(
hproc, addr, dllpath, size, None)
hthrd = kernel32.CreateRemoteThread(
hproc, None, 0, kernel32.LoadLibraryW, addr, 0, None)
kernel32.WaitForSingleObject(hthrd, INFINITE)
finally:
if addr is not None:
kernel32.VirtualFreeEx(hproc, addr, 0, MEM_RELEASE)
if hthrd is not None:
kernel32.CloseHandle(hthrd)
if hproc is not None:
kernel32.CloseHandle(hproc)
测试.c:
#include <Windows.h>
#include <stdio.h>
BOOL WINAPI DllMain(HINSTANCE hInstDll, DWORD fdwReason, PVOID fImpLoad)
{
switch (fdwReason) {
case DLL_PROCESS_ATTACH:
printf("DLL Attach\n");
break;
case DLL_PROCESS_DETACH:
printf("DLL Detach\n");
}
return TRUE;
}
演示:
>>> import sys
>>> from subprocess import Popen, PIPE
>>> from dllinject import injectdll
>>> cmd = [sys.executable, '-c', 'import time; time.sleep(10)']
>>> p = Popen(cmd, stdout=PIPE); injectdll(p.pid, 'test.dll')
>>> r = p.wait(); print(p.stdout.read().decode())
DLL Attach
DLL Detach
关于python-3.x - 使用 Python 3.2 CType 调用 CreateRemoteThread 时出现 Error_Invalid_Parameter 错误 57,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17392721/