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Hackvent 2019: Day 3

03 Dec 2019
CTF: Hackvent 2019
Link to challenge: https://academy.hacking-lab.com
Date Completed: 3 December 2019

 

Challenge

HV19.03 Hodor, Hodor, Hodor

Solution

At first this looks like it may possible be a hidden code with different variations of hodor mapping to English alphabet characters. However, before we look into frequency analysis we do a Google search for hodor programming language and discover that such an esoteric language exists!

We find an online interpreter/compiler TIO capable of running Hodor code and get this output:

As the hint suggests, we need to base64 decode that last string.

Doing so gives us our flag!

Flag:  HV19{h01d-th3-d00r-4204-ld4Y}

 
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