Misc
Challenges that don't fit in the other categories.
For a long time now, the aliens have listened to the music our radio waves sent through space. Finally, they have their chance to drop an album of their own! To build hype, they've released this track as a preview. But is there a secret inside?
From VU-CTF 2024
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The aliens left a note! Unfortunately the bottom half is missing. Can you recover it?
From VU-CTF 2024
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Can you read the sleeping giant's message?
Credit: Radboud
http://challs.studsec.nl:4200/sleepy.txt
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I've encrypted the flag with a strong seed phrase! There's no way you can crack it!
(flag.zip was created on ubuntu 22.04 LTS)
Credit: Rick de Jager
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Pokemon is cool! We even built our own Pokedex, can you find your flag?
Credit: Radboud
nc challs.studsec.nl 4100
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On November 16th 1974, scientists sent out a message into outer space, the Arecibo message. Its destination was the globular cluster Messier 13, and the message should take at least 25,000 years to arrive there. The message encodes an image depicting information about its senders, us, the humans from planet Earth.
Last week, our radio telescopes at the VU have picked up a strange signal coming from exactly the same direction. My colleagues quickly dismissed it as noise, but I believe that there is more to it. Could it be a response from intelligent extraterrestrial life to our Arecibo message?
Please help me in decoding the signal!
From VU-CTF 2024
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The Hive
The aliens seem to posess some kind of hive mind used to collect sensitive data, luckily we've found their central point of communication here https://discord.gg/BS2B7pB8. Can you tap into this datastream.?
From VU-CTF 2024
It seems quiet... too quiet, perhaps there is more to this server than meets the eye? Note: the flag needs to be properly formatted (^VUCTF{[A-Za-z0-9_+]*})
https://discord.gg/BS2B7pB8
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All this data coming in... can we exfiltrate it?
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PYJail
You found an alien device... Can you get access to it?
From VU-CTF 2024
nc challs.studsec.nl 4400
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The giant alien mothership is threatening to destroy the vu! Can you hack it?
From VU-CTF 2024
nc challs.studsec.nl 4300
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