Some writeups of the challenges I solved in Crypto CTF 2024

Challenge OMFG!! The virus evolved this time! I only managed to get the virus python compiled file I have a important file corrupted by the virus, please help me recover it again, I will give you ...

Challenge After we used Kuki’s birthday to unlock a phone in his place, we found a mysecret.apk in the phone, but it needs a passcode to view the secret. Flag format: SKR{flag} Note: Download th...

Challenge OMG! My picture is corrupted with the Kolona virus! I managed to get the virus source code and the corrupted picture, please help me recover it. I will give you a flag for a reward! Dif...

Secret Coffee Nut Stash You’ll never be able to break into my secret Java coffee nut stash! File: (CoffeNutStash.class) Type: Reverse Engineering Solutions First things first after downloading ...

Challenges You’ll never be able to break into my secret Java coffee nut stash! File: (pyc_fun.pyc) Type: Reverse Engineering Solutions First things first I noticed that it was a .pyc file. Thes...

Intro While browsing through the CTFLearn medium level challenges this challenge ciught my eye. So I thought why not I try my hand at this Problem At first sight I was very cofused on what to do...

Challenge Ghidra reversing challenge 2! We all love XORing! Flag format: SKR{flag} Difficulty: Medium Solution First, to begin, I downloaded the file (dragon2). Using the file command i figure...

OSI Challenge Iris and her assistant are away on vacation. She left an audio message explaining how to get in touch with her assistant. See what you can learn about the assistant. Transcript: Hel...

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