hack the box code example

Example 1: hackctf

HackCTF ctf.j0n9hyun.xyz

Example 2: hack sitw

Server:		192.168.1.1
Address:	192.168.1.1#53

Non-authoritative answer:
Name:    google.com
Address: 216.58.192.15

HAXXED

Example 3: hack sitw

<?php
  if (isset($_GET['domain'])) {
    echo '<pre>';
    $domain = $_GET['domain'];
    $lookdown = system("nslookup {$domain}");
    echo($lookup);
    echo '</pre>';
  }
?>