[WriteUp] Hackthebox Invite Code Challenge

I was planning to join Hack The Box for awhile but kept postponing it until today. I had free time on this beautiful Saturday afternoon, I thought why not give it a try.

It took around 45 minutes to get the result. I like the idea of hacking the invitation page first and proving you are worthy to join the community.

Let me tell you this though; “No, I will not provide you step by step guide how to do it”. Not only because it is not fair, but also it will ruin the fun.

URL: https://www.hackthebox.eu/en

Here is the page (Don’t forget to play with the background 😉 ):


And here are my hints:

  • Don’t complicate things. This is just a simple test to enter the site, so put that Burp down on the ground slowly.
  • This is a web page, the source code is the first thing you should check.
  • Don’t just look at the plain HTML code. Use your browser’s developer tools.
  • If there is javascript, there is something to look for.
  • Do you see any function names in any javascript code?
  • Have you tried running them on the browser’s console?
  • Do you know ROT13 encoding?
  • You have the message, so send that request.
  • We have “=” here, this is obviously encoded with Base64.
  • Did you decode it? Congratulations, continue with the registration process. 🙂


I hope this will be helpful enough. See you in there.


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