Dll注入经典方法完整版

来源：互联网发布：java如何实现线程编辑：程序博客网时间：2024/05/21 17:13

算是复习了，最经典的教科书式的Dll注入。

总结一下基本的注入过程，分注入和卸载

注入Dll：

1，OpenProcess获得要注入进程的句柄

2，VirtualAllocEx在远程进程中开辟出一段内存，长度为strlen(dllname)+1;

3，WriteProcessMemory将Dll的名字写入第二步开辟出的内存中。

4，CreateRemoteThread将LoadLibraryA作为线程函数，参数为Dll的名称，创建新线程

5，CloseHandle关闭线程句柄

卸载Dll：

1，CreateRemoteThread将GetModuleHandle注入到远程进程中，参数为被注入的Dll名

2，GetExitCodeThread将线程退出的退出码作为Dll模块的句柄值。

3，CloseHandle关闭线程句柄

3，CreateRemoteThread将FreeLibraryA注入到远程进程中，参数为第二步获得的句柄值。

4，WaitForSingleObject等待对象句柄返回

5，CloseHandle关闭线程及进程句柄。

//Code By Pnig0s1992 //Date:2012,3,13 #include <stdio.h> #include <Windows.h> #include <TlHelp32.h>   DWORD getProcessHandle(LPCTSTR lpProcessName)//根据进程名查找进程PID {     DWORD dwRet = 0;     HANDLE hSnapShot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);     if(hSnapShot == INVALID_HANDLE_VALUE)     {         printf("\n获得进程快照失败%d",GetLastError());         return dwRet;     }      PROCESSENTRY32 pe32;//声明进程入口对象     pe32.dwSize = sizeof(PROCESSENTRY32);//填充进程入口对象大小     Process32First(hSnapShot,&pe32);//遍历进程列表     do      {         if(!lstrcmp(pe32.szExeFile,lpProcessName))//查找指定进程名的PID         {             dwRet = pe32.th32ProcessID;             break;         }     } while (Process32Next(hSnapShot,&pe32));     CloseHandle(hSnapShot);     return dwRet;//返回 }  INT main(INT argc,CHAR * argv[]) {     DWORD dwPid = getProcessHandle((LPCTSTR)argv[1]);     LPCSTR lpDllName = "EvilDll.dll";     HANDLE hProcess = OpenProcess(PROCESS_VM_OPERATION|PROCESS_VM_WRITE,FALSE,dwPid);     if(hProcess == NULL)     {         printf("\n获取进程句柄错误%d",GetLastError());         return -1;     }     DWORD dwSize = strlen(lpDllName)+1;      DWORD dwHasWrite;     LPVOID lpRemoteBuf = VirtualAllocEx(hProcess,NULL,dwSize,MEM_COMMIT,PAGE_READWRITE);     if(WriteProcessMemory(hProcess,lpRemoteBuf,lpDllName,dwSize,&dwHasWrite))     {         if(dwHasWrite != dwSize)         {             VirtualFreeEx(hProcess,lpRemoteBuf,dwSize,MEM_COMMIT);             CloseHandle(hProcess);             return -1;         }      }else     {         printf("\n写入远程进程内存空间出错%d。",GetLastError());         CloseHandle(hProcess);         return -1;     }      DWORD dwNewThreadId;     LPVOID lpLoadDll = LoadLibraryA;     HANDLE hNewRemoteThread = CreateRemoteThread(hProcess,NULL,0,(LPTHREAD_START_ROUTINE)lpLoadDll,lpRemoteBuf,0,&dwNewThreadId);     if(hNewRemoteThread == NULL)     {         printf("\n建立远程线程失败%d",GetLastError());         CloseHandle(hProcess);         return -1;     }      WaitForSingleObject(hNewRemoteThread,INFINITE);     CloseHandle(hNewRemoteThread);      //准备卸载之前注入的Dll     DWORD dwHandle,dwID;     LPVOID pFunc = GetModuleHandleA;//获得在远程线程中被注入的Dll的句柄     HANDLE hThread = CreateRemoteThread(hProcess,NULL,0,(LPTHREAD_START_ROUTINE)pFunc,lpRemoteBuf,0,&dwID);     WaitForSingleObject(hThread,INFINITE);     GetExitCodeThread(hThread,&dwHandle);//线程的结束码即为Dll模块儿的句柄     CloseHandle(hThread);     pFunc = FreeLibrary;     hThread = CreateRemoteThread(hThread,NULL,0,(LPTHREAD_START_ROUTINE)pFunc,(LPVOID)dwHandle,0,&dwID); //将FreeLibraryA注入到远程线程中去卸载Dll     WaitForSingleObject(hThread,INFINITE);     CloseHandle(hThread);     CloseHandle(hProcess);     return 0; }

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