DLL注入記事本

Question

我想在記事本中顯示一個消息框，因此找到了一個簡單的dll注入示例。 注入器本身不是我的，並且似乎可以正常工作（獲取進程的id，創建一個遠程線程，獲取dll文件的絕對路徑）。 我認為問題在於dll的實現。 這些項目在沒有任何警告的情況下進行編譯，但是沒有達到預期的結果。 您可以看看並幫助我了解問題嗎？ （我已將dll的發行版本放在注射器項目文件夾中）

dllmain.cpp：

// dllmain.cpp : Defines the entry point for the DLL application.
#include "stdafx.h"

#include "dll.h"
#include <windows.h>

#include <stdio.h>
#include <stdlib.h>

DLLEXPORT void mess() {
    MessageBoxA(NULL, "HELLO THERE", "From Notepad", NULL);
}
BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
                     )
{
    switch (ul_reason_for_call)
{
    case DLL_PROCESS_ATTACH: mess(); break;
    case DLL_THREAD_ATTACH: mess(); break;
    case DLL_THREAD_DETACH: mess(); break;
    case DLL_PROCESS_DETACH: mess(); break;
}
return TRUE;
}

dll.h：

#ifndef _DLL_H_
#define _DLL_H_

# define DLLEXPORT __declspec (dllexport)

# define DLLIMPORT __declspec (dllimport)

DLLEXPORT void mess(void);
#endif 

和injection.cpp供參考，它包含一個查找所需進程id的函數，一個創建遠程線程的函數和一個main：

#include "stdafx.h"
#include <windows.h> 
#include <tlhelp32.h> 
#include <shlwapi.h> 
#include <conio.h> 
#include <stdio.h>
#include <iostream>
using namespace std;
#define WIN32_LEAN_AND_MEAN 
#define CREATE_THREAD_ACCESS (PROCESS_CREATE_THREAD | PROCESS_QUERY_INFORMATION | PROCESS_VM_OPERATION | PROCESS_VM_WRITE | PROCESS_VM_READ)
DWORD GetProcessId(IN PCHAR szExeName)

{
    DWORD dwRet = 0;
    DWORD dwCount = 0;

    HANDLE hSnapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);

    if (hSnapshot != INVALID_HANDLE_VALUE)
    {
        PROCESSENTRY32 pe = { 0 };
        pe.dwSize = sizeof(PROCESSENTRY32);

        BOOL bRet = Process32First(hSnapshot, &pe);

        while (bRet)
        {
            if (!strcmp( szExeName, pe.szExeFile))
            {
                dwCount++;
                dwRet = pe.th32ProcessID;
            }
            bRet = Process32Next(hSnapshot, &pe);
        }

        if (dwCount > 1)
            dwRet = 0xFFFFFFFF;

        CloseHandle(hSnapshot);
    }

    return dwRet;
}

BOOL CreateRemoteThreadInject(DWORD ID, const char * dll)
{
    HANDLE Process;

    LPVOID Memory;

    LPVOID LoadLibrary;

    if (!ID) return false;

    Process = OpenProcess(PROCESS_CREATE_THREAD | PROCESS_QUERY_INFORMATION | PROCESS_VM_READ | PROCESS_VM_WRITE | PROCESS_VM_OPERATION, FALSE, ID);

    LoadLibrary = (LPVOID)GetProcAddress(GetModuleHandle("kernel32.dll"), "LoadLibraryA");

    Memory = (LPVOID)VirtualAllocEx(Process, NULL, strlen(dll) + 1, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);

    WriteProcessMemory(Process, (LPVOID)Memory, dll, strlen(dll) + 1, NULL);

    CreateRemoteThread(Process, NULL, NULL, (LPTHREAD_START_ROUTINE)LoadLibrary, (LPVOID)Memory, NULL, NULL);

    CloseHandle(Process);

    VirtualFreeEx(Process, (LPVOID)Memory, 0, MEM_RELEASE);

    return true;
}

int main()
{
    char dll[MAX_PATH] ;

    GetFullPathName("testdll.dll", MAX_PATH, dll, NULL);

    DWORD ID = GetProcessId("notepad.exe");

    if (!CreateRemoteThreadInject(ID, dll)) cout<<"failure";

    else cout << "success";

    return 0;
}

謝謝。

Answer 1

小心x64 x86二進制文件

在Windows 7/8/10上，notepad.exe是64位進程，因此您需要在x64中編譯DLL和注射器