Music, Art, Tech and General Hackery

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This is an archive copy of and the completed 2022 Dialed up CTF

See the contest wrap up blog post for details! Note: Not all links below will work.


#DialedUpCTF is now complete! Thanks for playing!


Dialed Up CTF is a music and phreaking themed mini-CTF that is completely self-contained in an .mp3 file. To just listen to the song check it out on soundcloud, or for the full video check here.

This mini-CTF is jeopardy style with 10 challenges. The challenges are puzzle based and generally involve music or phreaking related themes. No software or binary exploitation skills are required, but some challenges are significantly easier to solve with coding/scripting.

The contest will run for just over a week until 2022-08-15 00:00 UTC.

To register for the contest, please create an account here.

Key Formats and submitting results

Prizes and Such


If you’re stuck on a challenge and would like a hint, there are hints listed with each challenge on the scoreboard site. If you’re still really stuck, tag us or DM @prjctmammoth on Twitter, or alternatively email us at prjctmammoth [at] – We want everyone with an interest at all skill levels to have fun, so we’re happy to help! Responses are best effort since we’ll also be attending Defcon :).

About the song

We tried to add a wide array of phreaking related sounds and samples including ~30 different ring tones, DTMF, a rotary phone, lots of modem noises and carrier recording samples. Hope you like it, we had fun with it :).

The official contest version of the song file can be found here. You can also listen to the song on soundcloud, but note that only the official .mp3 has the CTF contest data encoded in it.

Note: The contest mp3 file is benign and does not contain any exploits or malicious payloads. Other than having some extra metadata embedded in it, it’s a normal mp3 file and safe to open. Here’s the Virus Total scan link for reference.



File Hashes

SHA1 hashes:

Click here to register a user and play!