python中的ReadProcessMemory读取64位进程内存的麻烦
python中的ReadProcessMemory读取64位进程内存的麻烦
提问于 2015-11-22 14:09:30
当使用ERROR_NOACCESS读取64位进程(Minesweeper)的内存时，我得到了错误代码998 ( ReadProcessMemory )。我在windows 7 64位上使用python 3.5 64位。
奇怪的是，这个错误只发生在较高的地址上，例如0x0000 FF3E 0000。较低的地址，如0x0000 0012 AE40不会抛出错误并返回正确的扫雷数据。
当我在C#.NET中使用几乎相同的代码编写相同的程序并查看相同的地址时，它会工作，并且不会出现错误！
我知道我看到的地址是正确的，因为我可以通过欺骗引擎和VMMap看到它。我不知道这是否相关，但我所看到的更高的地址是Minesweeper中MineSweeper.exe模块的基本模块地址。
为什么python代码不能工作？
Python代码(为较高的地址抛出错误，但对较低的地址使用错误)：
import ctypes, struct
pid = 3484 # Minesweeper
processHandle = ctypes.windll.kernel32.OpenProcess(0x10, False, pid)
addr = 0x00000000FF3E0000 # Minesweeper.exe module base address
buffer = (ctypes.c_byte * 8)()
bytesRead = ctypes.c_ulonglong(0)
result = ctypes.windll.kernel32.ReadProcessMemory(processHandle, addr, buffer, len(buffer), ctypes.byref(bytesRead))
e = ctypes.windll.kernel32.GetLastError()
print('result: ' + str(result) + ', err code: ' + str(e))
print('data: ' + str(struct.unpack('Q', buffer)[0]))
ctypes.windll.kernel32.CloseHandle(processHandle)
# Output:
# result: 0, err code: 998
# data: 0C#.NET代码(64位项目，没有错误)：
[DllImport("kernel32.dll")]
static extern IntPtr OpenProcess(int dwDesiredAccess, bool bInheritHandle, int dwProcessId);
[DllImport("kernel32.dll")]
static extern Int32 ReadProcessMemory(IntPtr hProcess, IntPtr lpBaseAddress, [Out] byte[] buffer, UInt32 size, out IntPtr lpNumberOfBytesRead);
[DllImport("kernel32.dll")]
static extern bool CloseHandle(IntPtr hObject);
static void Main(string[] args)
{
var pid = 3484; // Minesweeper
var processHandle = OpenProcess(0x10, false, pid);
var addr = 0x00000000FF3E0000; // Minesweeper.exe module base address
var buffer = new byte[8];
IntPtr bytesRead;
var result = ReadProcessMemory(processHandle, new IntPtr(addr), buffer, (uint)buffer.Length, out bytesRead);
Console.WriteLine("result: " + result);
Console.WriteLine("data: " + BitConverter.ToInt64(buffer, 0).ToString());
CloseHandle(processHandle);
Console.ReadLine();
}
// Output:
// result: 1
// data: 12894362189Stack Overflow用户
发布于 2015-11-22 18:08:42
在使用ctypes时，最好是明确的。适当设置argtypes和restype将有助于检查参数的数量和类型，就像C#中的DllImport语句一样。
下面是一个迂腐的例子：
import ctypes as c
from ctypes import wintypes as w
pid = 4568 # Minesweeper
k32 = c.WinDLL('kernel32', use_last_error=True)
OpenProcess = k32.OpenProcess
OpenProcess.argtypes = w.DWORD,w.BOOL,w.DWORD
OpenProcess.restype = w.HANDLE
ReadProcessMemory = k32.ReadProcessMemory
ReadProcessMemory.argtypes = w.HANDLE,w.LPCVOID,w.LPVOID,c.c_size_t,c.POINTER(c.c_size_t)
ReadProcessMemory.restype = w.BOOL
CloseHandle = k32.CloseHandle
CloseHandle.argtypes = [w.HANDLE]
CloseHandle.restype = w.BOOL
processHandle = OpenProcess(0x10, False, pid)
addr = 0x00000000FF900000 # Minesweeper.exe module base address
data = c.c_ulonglong()
bytesRead = c.c_ulonglong()
result = ReadProcessMemory(processHandle, addr, c.byref(data), c.sizeof(data), c.byref(bytesRead))
e = c.get_last_error()
print('result: {}, err code: {}, bytesRead: {}'.format(result,e,bytesRead.value))
print('data: {:016X}h'.format(data.value))
CloseHandle(processHandle)输出：
result: 1, err code: 0, bytesRead: 8
data: 0000000300905A4Dh还请注意，您可以传递数据变量的地址，而不是创建缓冲区并用struct模块解压缩它。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/33855690
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