This is a walk-through of the first level of the CTF box series named Kioptrix. The virtual machines images can be downloaded from: https://www.vulnhub.com/entry/kioptrix-level-1-1,22/ There are two methods I used to exploit this machine, but first, let’s enumerate the server. Enumeration To start, I ran a Nmap scan on the server to see what services are running on it. # Nmap 7.70 scan initiated Sat Apr 13 14:05:06 2019 as: nmap -O -A -sV -sC -oA nmap/knoptrix1 192.