CyberSoc Write-Up nightclub

About CyberSoc

The Cyber Investigator CTF was created by Jack Tilson of Cyber Society at Cardiff University. There are over 30 free & predominantly OSINT-based challenges drawing from a range of scenarios, putting your analytical skills to the test!


This OSINT challenge is from the section Covert Operations and is worth 500 points.


We’ve been monitoring the movements of a few somewhat well-known club DJs-for-hire with sketchy pasts.

A couple of days ago, we parked one of our investigators outside a nightclub which previous checks suggest is linked to a drug-related money laundering scheme. We also happen to know that each of the DJs we’ve been following use Spotify for their music at venues.

Unfortunately, the DJ for the evening must have used another entrance as our suveillance team didn’t spot anyone matching the profile of any of our suspects that night.

It would be useful for us to know the name of the song that is playing in the attached recording, as this will enable us to scrape the listening histories of our suspects and match the two up to identify who was there at the time.

We’re hoping to recruit this particular DJ and leverage the likely trust that has been established with the club management to utilise them as an informant.

This will help us to infiltrate the drug gang running the nightclub and move us closer to dismantling their operation.

Expected flag format: XXXXXXXXX

For completing this challenge, the audio file club_overwatch.wav is provided as download.


This challenge can be solved within 5 minutes. Download the app Shazam on your smartphone. Play the downloaded music, and Shazam will tell you everything you need to solve this challenge.

The flag: Limitless

This post is licensed under CC BY 4.0 by the author.