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我在这里关注这个 Stackoverflow 问题。我正在尝试读取存储在notepad.exe内存空间中的数据。但是我的get_data函数似乎什么也没返回。我有一些文本存储在记事本中，我想从 RAM 中检索该文本并将其存储在 Python 中的变量中。这是代码：

import os
from ctypes import *
from ctypes.wintypes import *

def get_pid(exe_name):
    x = os.popen('tasklist /FI "ImageName eq '+process_name+'"').read()
    if not x.find("No tasks are running") >= 0:
        return int(list(filter(None, x[x.find(process_name):-1].split(" ")))[1])
    return -1

def get_data(PROCESS_ID, PROCESS_HEADER_ADDR, STRLEN=255, PROCESS_VM_READ=0x0010):
    k32 = WinDLL('kernel32')
    k32.OpenProcess.argtypes = DWORD,BOOL,DWORD
    k32.OpenProcess.restype = HANDLE
    k32.ReadProcessMemory.argtypes = HANDLE,LPVOID,LPVOID,c_size_t,POINTER(c_size_t)
    k32.ReadProcessMemory.restype = BOOL

    process = k32.OpenProcess(PROCESS_VM_READ, 0, PROCESS_ID)
    buf = create_string_buffer(STRLEN)
    s = c_size_t()
    if k32.ReadProcessMemory(process, PROCESS_HEADER_ADDR, buf, STRLEN, byref(s)):
        return (s.value,buf.raw)


process_name = "notepad.exe"
pid = get_pid(process_name)
process_header_addr = 0x7FF79A1E0000 # address from VMMap

data = get_data(pid, process_header_addr)

当我运行此代码时，没有任何数据，它什么也不打印：

>>> print(data)
None
>>>

如何检索数据？

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1 回答 1

0

[MS.Docs]：ReadProcessMemory 函数状态：

如果函数失败，则返回值为 0（零）。要获取扩展的错误信息，请调用GetLastError。

这是一个小例子。

代码00.py：

#!/usr/bin/env python

import sys
import ctypes as ct
from ctypes import wintypes as wt


PROCESS_VM_READ = 0x0010


def main(*argv):
    kernel32 = ct.WinDLL("kernel32")

    OpenProcess = kernel32.OpenProcess
    OpenProcess.argtypes = [wt.DWORD, wt.BOOL, wt.DWORD]
    OpenProcess.restype = wt.HANDLE

    ReadProcessMemory = kernel32.ReadProcessMemory
    ReadProcessMemory.argtypes = [wt.HANDLE, wt.LPCVOID, wt.LPVOID, ct.c_size_t, ct.POINTER(ct.c_size_t)]
    ReadProcessMemory.restype = wt.BOOL

    GetLastError = kernel32.GetLastError
    GetLastError.argtypes = []
    GetLastError.restype = wt.DWORD

    CloseHandle = kernel32.CloseHandle
    CloseHandle.argtypes = [wt.HANDLE]
    CloseHandle.restype = wt.BOOL

    np_pid = 34376  # Got it from a process monitoring tool
    np = OpenProcess(PROCESS_VM_READ, 0, np_pid)
    if not np:
        print("OpenProcess failed: {0:d}".format(GetLastError()))
        return

    buf_len = 0x0F # 0xFF  # Lower value for display purposes
    buf = ct.create_string_buffer(buf_len)
    read = ct.c_size_t()
    addr = 0x00001CF26F20000  # Got a readable address from VMMap as well, but I don't know the one where the actual text is stored

    res = ReadProcessMemory(np, addr, buf, buf_len, ct.byref(read))
    if res:
        print("Read ({0:d} bytes) from process ({1:d}) address 0x{2:016X}:".format(read.value, np_pid, addr))
        text = ""
        for i in range(read.value):
            text += " 0x{0:02X}".format(ord(buf[i]))
        print(text)
    else:
        print("ReadProcessMemory failed: {0:d}".format(GetLastError()))

    CloseHandle(np)


if __name__ == "__main__":
    print("Python {0:s} {1:d}bit on {2:s}\n".format(" ".join(elem.strip() for elem in sys.version.split("\n")), 64 if sys.maxsize > 0x100000000 else 32, sys.platform))
    main(*sys.argv[1:])
    print("\nDone.")

输出：

[cfati@CFATI-5510-0:e:\Work\Dev\StackOverflow\q063273381]> "e:\Work\Dev\VEnvs\py_pc064_03.07.06_test0\Scripts\python.exe" code00.py
Python 3.7.6 (tags/v3.7.6:43364a7ae0, Dec 19 2019, 00:42:30) [MSC v.1916 64 bit (AMD64)] 64bit on win32

Read (15 bytes) from process (34376) address 0x000001CF26F20000:
 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0x00 0xC2 0x3B 0x78 0x62 0xE6 0xFA 0x00

Done.

更新#0

我不知道记事本如何在内部组织它的内存。我可以假设文本存储在一个缓冲区（或者更多，可能是每行一个，...）中，该缓冲区应该驻留在堆区域中。但具体在哪里我不能说。您可以使用工具检查进程内存（我知道CheatEngine可以做到这一点）在内存内容和文本之间进行匹配，并获取该地址，并将其粘贴到代码中，但我认为这会：

  • 击败脚本的目的（因为脚本用于自动化，代替用户完成工作）
  • 不靠谱。缓冲区分配有特定长度。如果用户继续在记事本中输入内容，最终该缓冲区将变满并且（在幕后）它将被重新定位，这将（很可能）更改其地址


总而言之，我不认为这是要走的路。您可以搜索替代方案，例如使用WinAPI将消息（可能是WM_GETTEXT）发送到记事本窗口以获取文本。我不知道该怎么做，但我记得我能够使用WM_CHAR以编程方式在记事本中插入字符。或者您可以发送一个, ，然后获取剪贴板内容。
Ctrl + ACtrl + C

于 2020-08-05T21:57:24.537 回答