Hack The Box — Optimum Writeup w/o Metasploit

This is the fifth blog out of a series of blogs I will be publishing on retired HTB machines in preparation for the OSCP. The full list of OSCP like machines compiled by TJnull can be found here.

Let’s get started!

Reconnaissance

First thing first, we run a quick initial nmap scan to see which ports are open and which services are running on those ports.

nmap -sC -sV -O -oA nmap/initial 10.10.10.8

• -sC: run default nmap scripts
• -sV: detect service version
• -O: detect OS
• -oA: output all formats and store in file nmap/initial

We get back the following result showing that only one port is open:

• Port 80: running HttpFileServer httpd 2.3.

Nmap Initial Scan

Before we start investigating these ports, let’s run more comprehensive nmap scans in the background to make sure we cover all bases.

Let’s run an nmap scan that covers all ports.

nmap -sC -sV -O -p- -oA nmap/full 10.10.10.8