Hack the Box (HTB) machines walkthrough series — Registry

Today, we will be continuing with our exploration of Hack the Box (HTB) machines as seen in previous articles. This walkthrough is of an HTB machine named Registry.

HTB is an excellent platform that hosts machines belonging to multiple OSes. It also has some other challenges as well. Individuals have to solve the puzzle (simple enumeration plus pen test) in order to log into the platform and download the VPN pack to connect to the machines hosted on the HTB platform.

Note: Only write-ups of retired HTB machines are allowed. The machine in this article, named Registry, is retired.

The walkthrough

Let’s start with this machine.

  1. Download the VPN pack for the individual user and use the guidelines to log into the HTB VPN.
  2. The “Registry” machine IP is
  3. We will adopt our usual methodology of performing penetration testing. Let’s start with enumeration in order to gain as much information about the machine as possible.
  4. As usual, let’s start with the nmap scan to learn more about the services running on this machine. [CLICK IMAGES TO ENLARGE]
    <<nmap -sC -sV -oA Registry>>

  5. Let’s start with the directory enumeration, as shown below. We got a hit on multiple directories. One among them is v2.
    <<gobuster dir -u https://docker.registry.htb -w /usr/share/wordlists/dirbuster/directory-list-2.3-medium.txt -t 20 -k>>
  6. From nmap scanning, we can see docker.registry.htb. Adding that to the hosts file and browsing for v2 prompts a credential box. The username and password combination Admin/Admin worked here.
  7. After this, we can see that this box has exposed Docker API. We can start enumeration on well-known paths for Docker API.
  8. Looking into catalogs for this repo reveals a repository named “bolt-image.”
  9. Looking into the tags for image bolt-image, we could (Read more...)

*** This is a Security Bloggers Network syndicated blog from Infosec Resources authored by Security Ninja. Read the original post at: http://feedproxy.google.com/~r/infosecResources/~3/r2-vi2xtl9s/