windows-DLL注入
阅读原文时间:2023年07月08日阅读:2

DLL注入

    刚刚整理的代码注入(远程线程注入)现在整理这个DLL注入,DLL注入比较常用,相比远程代码注入DLL注入没有什么太多的限制,而且实现起来比较简单,当然远程线程需要注意的问题DLL很多情况都需要注意,这里不做重复,只说代码注入里面没有说过的部分。DLL注入的方式不唯一,比如你如果完全看懂了代码注入,那么你直接LoadLibrary地址和一个dll路径传进去然后在里面load一下就行了,也就是之前的代码注入完全可以实现dll注入,今天就说下一通常dll的注入方式吧,通常dll的注入比我刚刚说的那个方法还要简单,流程和代码注入差不多但是简单了很多,思路是这样,LoadLibrary这个函数所有的进程都是地址一样,我们直接获取LoadLibrary的地址,然后在CreateRemoteThread里面直接把这个地址作为线程地址传过去,然后参数就是我们已经拷贝到对方内存里的那个字符串,这样直接就跑起来了,非常简单,在DLL里想干什么就干什么,可以和本地写代码一样,然后还有一个问题,就是注意一下,dll在入口的switch里面的第一个分支直接调用你想干的事就行了,那个分支的意思就是说当dll被第一次载入的时候就自动执行了,OK就这么简单,如果你觉得没听懂,那么需要看我之前说的那个代码注入,这个里面只说了新的东西,还有就是dll注入应该注意的几个地方:

1.dll的入口记得就调用自己的函数,别走正当的流程,如果你非蛋疼的想调用某个指定函数,当然可以用代码注入结合dll注入的方式,但是 然并卵。

2.注意系统问题,32exe+32dll注入32位程序,64exe+64dll注入64位程序。

3.加入你注入了QQ,发现第一次注入成功了,但是第二次注入代码没报错,但是么执行自己想要的,什么情况?,原因在于同一个dll被加同一个程序加载两次的时候,第二次不会加载,给优化掉了,把QQ关了重开就行,或者自己找到某个地方free掉自己的dll。OK一共就这些,接下来是我封装好的一个DLL调用库,没有写的很细,如果是使用建议简单修改整理(我写了测试例子,在这里http://download.csdn.net/detail/u013761036/9603051)。

.H
    #pragma once
    #include <Windows.h>
    #include <stdlib.h>
    #include <tlhelp32.h>
    #include <Psapi.h>
    #include <string>

    using std::string;
    using std::wstring;

    #pragma comment (lib,"Psapi.lib")

    #pragma warning(disable:4996)

    class CInstDll
    {
    private:
        bool AdjustProcessTokenPrivilege();
        bool Camp2str(wstring wsStrA ,wstring wsStrB);
        DWORD GetProcessIdByName(const wstring &wsProcessName);
        std::string  ws2s(const std::wstring& s_src,UINT CodePage = CP_ACP);
        std::wstring s2ws( const std::string& s_src,UINT CodePage = CP_ACP);

    public:
        bool InjectionDll2ProA(const string &strPorcessName ,const string &strDllPath);
        bool InjectionDll2ProW(const wstring &wsPorcessName ,const wstring &wsDllPath);
    };

.CPP
    #include "stdafx.h"
    #include "InstDll.h"

    bool CInstDll::AdjustProcessTokenPrivilege()
    {
        LUID luidTmp;
        HANDLE hToken;
        TOKEN_PRIVILEGES tkp;

        if(!OpenProcessToken(GetCurrentProcess(), TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
            return false;
        if(!LookupPrivilegeValue(NULL, SE_DEBUG_NAME, &luidTmp))
        {
            CloseHandle(hToken);
            return FALSE;
        }
        tkp.PrivilegeCount = 1;
        tkp.Privileges[0].Luid = luidTmp;
        tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

        if(!AdjustTokenPrivileges(hToken, FALSE, &tkp, sizeof(tkp), NULL, NULL))
        {
            CloseHandle(hToken);
            return FALSE;
        }
        return true;
    }

    bool CInstDll::Camp2str(wstring wsStrA ,wstring wsStrB)
    {
        int nSize = wsStrA.length();
        for(int i = 0 ;i < nSize ;i ++)
        {
            if(wsStrA[i] >= 'A' && wsStrA[i] <= 'Z')
                wsStrA[i] += 'a'- 'A';
        }

        nSize = wsStrB.length();
        for(int i = 0 ;i < nSize ;i ++)
        {
            if(wsStrB[i] >= 'A' && wsStrB[i] <= 'Z')
                wsStrB[i] += 'a'- 'A';
        }

        return wsStrA == wsStrB;
    }

    DWORD CInstDll::GetProcessIdByName(const wstring &wsProcessName)
    {
        HANDLE hProcess = 0;
        DWORD  dwProcess[2048] ,dwNeeded;
        TCHAR  tcProcName[MAX_PATH] = {0};
        wstring wsNowProcessName = L"";
        int nTempSize = 0;
        int nPos = 0;

        EnumProcesses(dwProcess, sizeof(dwProcess), &dwNeeded);

        for(int i = 0 ;i < dwNeeded / sizeof(DWORD) ;i++)
        {
            if(0 != dwProcess[i])
            {
                hProcess = OpenProcess( PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, dwProcess[i]);
                GetModuleFileNameEx(hProcess, NULL, tcProcName, MAX_PATH);
                nPos = wstring(tcProcName).find_last_of(L'\\');
                if(nPos != wstring::npos)
                {
                    wsNowProcessName = wstring(wstring(tcProcName).substr(nPos + 1));
                    if(Camp2str(wsProcessName ,wsNowProcessName))
                    {
                        DWORD aa = dwProcess[i];
                        return aa;
                    }
                    //if(wsProcessName == wsNowProcessName)
                    // return dwProcess[i];
                }
            }
        }
        return 0;
    }

    std::string CInstDll::ws2s(const std::wstring& wide, UINT CodePage)
    {
        int wide_length = static_cast<int>(wide.length());
        if (wide_length == 0)
            return std::string();

        // Compute the length of the buffer we'll need.
        int charcount = WideCharToMultiByte(CodePage, 0, wide.data(), wide_length,
            NULL, 0, NULL, NULL);
        if (charcount == 0)
            return std::string();

        std::string mb;
        mb.resize(charcount);
        WideCharToMultiByte(CodePage, 0, wide.data(), wide_length,
            &mb[0], charcount, NULL, NULL);

        return mb;
    }

    std::wstring CInstDll::s2ws( const std::string& mb,UINT CodePage)
    {
        if (mb.empty())
            return std::wstring();

        int mb_length = static_cast<int>(mb.length());
        // Compute the length of the buffer.
        int charcount = MultiByteToWideChar(CodePage, 0,
            mb.data(), mb_length, NULL, 0);
        if (charcount == 0)
            return std::wstring();

        std::wstring wide;
        wide.resize(charcount);
        MultiByteToWideChar(CodePage, 0, mb.data(), mb_length, &wide[0], charcount);

        return wide;
    }

    bool CInstDll::InjectionDll2ProW(const wstring &wsPorcessName ,const wstring &wsDllPath)
    {
    //1.提权
    if(!AdjustProcessTokenPrivilege())
        return false;

    //2.获取pid
    DWORD dwProPID = 0;
    if((dwProPID = GetProcessIdByName(wsPorcessName)) == 0)
        return false;

    //3.打开进程
    HANDLE hProcess = NULL;
    if((hProcess=OpenProcess(PROCESS_ALL_ACCESS,FALSE ,dwProPID)) == NULL)
        return false;

    //4.初始化参数数据

    PTHREAD_START_ROUTINE dwLoadLibraryAddress =  (PTHREAD_START_ROUTINE)GetProcAddress(GetModuleHandle(TEXT("kernel32.dll")),"LoadLibraryA");
    if(dwLoadLibraryAddress == 0)
        return false;
    char tcCache[MAX_PATH] = {0};
    strcat(tcCache ,ws2s(wsDllPath).c_str());

    //5.在宿主进程里分配内存,用于存参数
    char *pPara = NULL;
    pPara = (char *)VirtualAllocEx(hProcess , 0 ,sizeof(tcCache) ,MEM_COMMIT,PAGE_READWRITE);
    if(pPara == NULL)  return false;

    //6.把参数写入宿主进程里,注意结构体的命名(_REMOTE_PARAMETER)
    if(!WriteProcessMemory(hProcess ,pPara ,tcCache ,sizeof(tcCache) ,0))
        return false;

    //7.启动注入宿主进程的进程
    DWORD dwThreadId = 0;
    HANDLE hThread = CreateRemoteThread(hProcess ,0 ,0 ,dwLoadLibraryAddress ,pPara ,0 ,&dwThreadId);
    if(!hThread) return false;

    //9.等待线程结束,然后清理内存    

    WaitForSingleObject(hThread ,INFINITE);
    CloseHandle(hThread);
    VirtualFreeEx(hProcess ,pPara ,0 ,MEM_RELEASE);
    CloseHandle(hProcess);
    return true;
    }

    bool CInstDll::InjectionDll2ProA(const string &strPorcessName ,const string &strDllPath)
    {
        return InjectionDll2ProW(s2ws(strPorcessName) ,s2ws(strDllPath));
    }

USER
    #include "stdafx.h"
    #include "InstDll.h"

    int _tmain(int argc, _TCHAR* argv[])
    {
        CInstDll cIn;
        //cIn.InjectionDll2ProW(L"qq.exe" ,L"c:\\MyFirstDll32.dll"); //"explorer.exe
        cIn.InjectionDll2ProA("explorer.exe" ,"c:\\MyFirstDll64.dll"); //"explorer.exe
        return 0;
    }    

我再把当时测试用的一个简单DLL代码贴出来吧
    // dllmain.cpp : 定义 DLL 应用程序的入口点。
    #include "stdafx.h"

    void DoSomethings()
    {
        MessageBoxW(NULL ,L"do some things" ,L"T" ,MB_OK);
    }

    BOOL APIENTRY DllMain( HMODULE hModule,
                           DWORD  ul_reason_for_call,
                           LPVOID lpReserved
                         )
    {
        switch (ul_reason_for_call)
        {
        case DLL_PROCESS_ATTACH:
        {
            DoSomethings();
        }break;
        case DLL_THREAD_ATTACH:
        case DLL_THREAD_DETACH:
        case DLL_PROCESS_DETACH:
            break;
        }
        return TRUE;
    }