• 实现远程线程DLL注入


    32位:远程线程注入

    远程线程注入是最常用的一种注入技术,该技术利用的核心API是 `CreateRemoteThread()` 这个API可以运行远程线程,其次通过创建的线程调用 `LoadLibraryA()` 这个函数动态载入指定的DLL即可实现运行DLL,
    而`LoadLibrary()`函数在任何一个可执行文件中都可以被调用到,这就给我们注入提供了有效的条件.

    #include <windows.h>
    #include <stdio.h>
    
    void InjectDLL(DWORD PID,char *Path) 
    {
    DWORD dwSize;
    HANDLE hProcess=OpenProcess(PROCESS_ALL_ACCESS,false,PID);
    dwSize=strlen(Path)+1;
    
    LPVOID lpParamAddress=VirtualAllocEx(hProcess,0,dwSize,PARITY_SPACE,PAGE_EXECUTE_READWRITE);
    WriteProcessMemory(hProcess,lpParamAddress,(PVOID)Path,dwSize,NULL);
    
    HMODULE hModule=GetModuleHandleA("kernel32.dll");
    LPTHREAD_START_ROUTINE lpStartAddress=(LPTHREAD_START_ROUTINE)GetProcAddress(hModule,"LoadLibraryA");
    HANDLE hThread=CreateRemoteThread(hProcess,NULL,0,lpStartAddress,lpParamAddress,0,NULL);
    WaitForSingleObject(hThread,1000);
    CloseHandle(hThread);
    }
    
    int main()
    {
    InjectDLL(1258,"C:hook.dll");
    return 0;
    }

    64位:远程线程注入

    #include <stdio.h>
    #include <windows.h>
    
    BOOL WINAPI InjectProxyW(DWORD dwPID, PCWSTR pwszProxyFile)
    {
        BOOL ret = FALSE;
        HANDLE hToken = NULL;
        HANDLE hProcess = NULL;
        HANDLE hThread = NULL;
        FARPROC pfnThreadRtn = NULL;
        PWSTR pwszPara = NULL;
        hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, dwPID);
        pfnThreadRtn = GetProcAddress(GetModuleHandle(TEXT("Kernel32")), "LoadLibraryW");
        size_t iProxyFileLen = wcslen(pwszProxyFile)*sizeof(WCHAR); //May be in your case iProxyFileLen containes invalid value.
        pwszPara = (PWSTR)VirtualAllocEx(hProcess, NULL, iProxyFileLen, MEM_COMMIT, PAGE_READWRITE);
        WriteProcessMemory(hProcess, pwszPara, (PVOID)pwszProxyFile, iProxyFileLen, NULL);
        hThread = CreateRemoteThread(hProcess, NULL, 1024, (LPTHREAD_START_ROUTINE)pfnThreadRtn, pwszPara, 0, NULL);
        WaitForSingleObject(hThread, INFINITE);
        CloseHandle(hThread);
        VirtualFreeEx(hProcess, pwszPara, 0, MEM_RELEASE);
        CloseHandle(hProcess);
        return(TRUE);
    }
    
    int main()
    {
        WCHAR dllname[MAX_PATH];
        DWORD dwPID = 0;
        printf("input pid: "); scanf("%ld", &dwPID);
        //printf("input dll full path: "); scanf("%ws", dllname);
        InjectProxyW(dwPID,L"C:\hook.dll");
        //InjectProxyW(dwPID, dllname);
        return 0;
    }


    ### 消息钩子注入(过保护)

    消息钩子注入原理是利用Windows系统中`SetWindowsHookEx()`这个API函数,它可以拦截目标进程的消息到指定的DLL中导出的函数,利用这个特性,我们可以将DLL注入到指定进程中,
    该函数的注入属于全局注入,部分游戏保护是无法识别这种注入方式的,我们在注入后需要在代码中判断一下进程是不是我们需要注入的,不然会对全局生效。

    1.首先我们需要创建一个Dll工程 hook.cpp 然后将SetHook方法导出,在DllMain中进行了判断,如果窗口句柄为valve001则弹出一个消息框,其他进程直接跳过,即可实现指定进程注入。

    #include <windows.h>
    HHOOK global_hook;
    
    LRESULT CALLBACK MyProc(int nCode, WPARAM wParam, LPARAM lParam)
    {
    return CallNextHookEx(global_hook, nCode, wParam, lParam);
    }
    extern "C" __declspec(dllexport) void SetHook()
    {
    global_hook = SetWindowsHookEx(WH_CBT, MyProc, GetModuleHandle(TEXT("hook.dll")), 0);
    }
    bool APIENTRY DllMain(HANDLE handle, DWORD dword, LPVOID lpvoid)
    {
    HWND hwnd = FindWindowW(L"valve001",NULL);
    DWORD pid;
    GetWindowThreadProcessId(hwnd, &pid);
    if (GetCurrentProcessId() == pid)
    {
    MessageBox(hwnd, TEXT("inject"), 0, 0);
    }
    return true;
    }

    2.调用代码如下,注意必须将上方编译好的hook.dll与下方工程放到同一个目录下,通过LoadLibrary函数获取到模块句柄,然后通过GetProcAddress获取到导出函数地址,并通过函数指针调用。

    #include <windows.h>
    int main()
    {
    HMODULE hMod = LoadLibrary(TEXT("hook.dll"));
    typedef void(*pSetHook)(void);
    pSetHook SetHook = (pSetHook)GetProcAddress(hMod, "SetHook");
    SetHook();
    while (1)
    {
    Sleep(1000);
    }
    return 0;
    }
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  • 原文地址:https://www.cnblogs.com/LyShark/p/11066063.html
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