BelkaCTF #7: Stranger Dfings

BelkaCTF #7 is over, and the Earth is safe from the extraterrestrial perpetrators (for now!). Thank you for playing, we hope you enjoyed it! Congratulations to the winners:
Student track: LEEJINUNG, k3vg3n, d1v1ne
Professional track: br1g, its5Q, Flip

đź“„ BelkaCTF #7: Stranger Dfings write-up

My head went dizzy as I was digging through the guy’s chat messages. What is that, some kind of code they’re using to talk about the shady stuff? Trafficking, weapons... or more like drugs?

—Chief, his chat patterns are so random, never seen this kind of stuff before. I’ll waste weeks just reading through everything and trying to decode what those junkies are talking about!

The Chief snorted—Use your intelligence!

Tricky
140
Junk Messaging
Solved 127 times

Which dependency-causing substance is mentioned in the chat logs on the phone?
Format: common name, e.g. ketamine

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