【发布时间】:2017-03-08 10:21:43
【问题描述】:
我的操作系统是 Windows 8.1 64 位。我的程序是向目标进程注入一个DLL文件,当这个DLL文件附加到一个进程时,它会在D:上创建一个.txt文件,并在其中写入一些文字并保存。它只是一个测试。但是当我将我的程序编译为 32 位程序并且我的 DLL 代码编译为 32 位时,它成功了,它可以创建文件并保存内容。但是当我将我的 DLL 代码和我的程序编译为 64 位时,它没有抛出任何异常,一切似乎都成功了。但是你找不到它创建的.txt 文件。所以,它失败了,没有执行你想做的事情。
以下是我的 DLL 代码
#include "stdafx.h"
#include<Windows.h>
#include<stdio.h>
#include<stdlib.h>
BOOL create();
BOOL APIENTRY DllMain( HMODULE hModule,
DWORD ul_reason_for_call,
LPVOID lpReserved
)
{
switch (ul_reason_for_call)
{
case DLL_PROCESS_ATTACH:
create();
break;
case DLL_PROCESS_DETACH:
break;
}
return TRUE;
}
BOOL create()
{
wchar_t FileName[] = L"D:\\x64injecttest.txt";
HANDLE hFile = ::CreateFile(FileName, GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_ALWAYS, NULL, NULL);
if (hFile == INVALID_HANDLE_VALUE)
{
printf("createfile fails,the error code is:%u\n", GetLastError());
system("PAUSE");
return 0;
}
char str[] = "if you see this file,then you have success\n";
WriteFile(hFile, str, strlen(str) + 1, NULL, NULL);
CloseHandle(hFile);
return TRUE;
}
以下是我的程序代码
#include<stdio.h>
#include<stdlib.h>
#include<Windows.h>
#include<TlHelp32.h>
LPTHREAD_START_ROUTINE lpThreadProc; //pointes to the address of LoadLibraryW API
typedef DWORD(WINAPI *pFunction)(PHANDLE ThreadHandle, ACCESS_MASK DesiredAccess, LPVOID ObjectAttributes, HANDLE ProcessHandle, LPTHREAD_START_ROUTINE lpStartAddress, LPVOID lpParameter, BOOL CreateSuspended, DWORD dwStackSize, DWORD dw1, DWORD dw2, LPVOID pUnknown); //I inject DLL to other process with the NtCreateThreadEx API , and this function pointer would point to the address of this API
DWORD SearchForTarget(wchar_t target[])
{
PROCESSENTRY32 pe32;
pe32.dwSize = sizeof(pe32);
HANDLE hSnap = ::CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if (hSnap == INVALID_HANDLE_VALUE)
{
printf("fails when createtoolhelp32snapshot,the error code is:%u\n", GetLastError());
system("PAUSE");
exit(-1);
}
BOOL b = ::Process32First(hSnap, &pe32);
while (b)
{
printf("the process name is:%ws\n", pe32.szExeFile);
printf("the process id is:%u\n", pe32.th32ProcessID);
if (wcscmp(pe32.szExeFile, target) == 0)
return pe32.th32ProcessID;
b = Process32Next(hSnap, &pe32);
}
return -1;
}
BOOL InjectDLL(DWORD pid)
{
wchar_t DLLPath[] = L"C:\\Users\\Dell-pc\\Desktop\\x64InjectTest\\Debug\\DLL.dll";
DWORD length = wcslen(DLLPath);
DWORD trueLength = length * 2 + 2;
HANDLE hProcess = ::OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);
if (hProcess == INVALID_HANDLE_VALUE)
{
printf("openprocess fails,the error code is:%u\n", GetLastError());
system("PAUSE");
exit(-1);
}
LPVOID pBaseAddress = ::VirtualAllocEx(hProcess, NULL, trueLength, MEM_COMMIT, PAGE_READWRITE);
if (pBaseAddress == NULL)
{
printf("virtualallocex fails,the error code is:%u\n", GetLastError());
system("PAUSE");
exit(-1);
}
BOOL b = WriteProcessMemory(hProcess, pBaseAddress, DLLPath, trueLength, NULL);
if (b == 0)
{
printf("writeprocessmemory fail,the error code is:%u\n", GetLastError());
system("PAUSE");
exit(-1);
}
HMODULE hModule = ::LoadLibrary(L"kernel32.dll");
lpThreadProc = (LPTHREAD_START_ROUTINE)::GetProcAddress(hModule, "LoadLibraryW");
HMODULE hNtdll = ::LoadLibrary(L"ntdll.dll");
pFunction pFunc = (pFunction)GetProcAddress(hNtdll, "NtCreateThreadEx");
printf("it is ready to create thread\n");
HANDLE hRemoteThread;
pFunc(&hRemoteThread, 0x1FFFFF, NULL, hProcess, lpThreadProc, pBaseAddress, FALSE, NULL, NULL, NULL, NULL);
if (hRemoteThread == NULL)
{
printf("nrcreateprocessex fails,the error code is:%u\n", GetLastError());
system("PAUSE");
exit(-1);
}
WaitForSingleObject(hRemoteThread, INFINITE);
return TRUE;
}
int main()
{
wchar_t target[] = L"notepad.exe"; //inject my DLL to notepad.exe
DWORD pid = SearchForTarget(target);
if (pid == -1)
{
printf("not find the target \n");
system("PAUSE");
return -1;
}
InjectDLL(pid);
system("PAUSE");
return 0;
}
我将我的代码(我的程序和我的 DLL)编译为 32 位,并在我的 Windows 8.1 64 位操作系统上运行它,它成功了。但是当我将它(我的程序和我的 DLL)编译为 64 位时,它没有抛出任何异常,而且它似乎成功了,只是它没有创建文件并在其中写入一些单词(这是应该做的)当 DLL 附加到进程时)。那么,有谁知道问题出在哪里?还有一件事,我使用 Visual Studio 2013。
【问题讨论】:
-
目标是 64 位进程。您还忽略了 NtCreateThreadEx 的返回值。别。那是什么价值。
-
FWIW 你的代码泄漏处理得像疯了似的,但也许你知道并且不在乎。
-
@DavidHeffernan 它是 64 位 notepad.exe ,我也尝试注入到 64 位 Internet Explorer.exe
-
返回值呢?毕竟,万一发生故障,有什么办法可以将 hRemoteThread 设置为 NULL?
-
您只需调试注入器和目标进程即可了解错误的位置/原因
标签: c windows winapi dll dll-injection