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GitS teaser 2012 – AL’s revenge

AL’s revenge was basically a crypto/math challenge with some file format puzzling at the start. The given file is an XZ archive which contains a program in LLVM bytecode. Since the unix ‘file’ utility...

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MozillaCTF 2012 – SecureFileLock

This very secure locking mechanism encloses files and only gives them to you when you know the passphrase. Find it and you will have the flag. This challenge requires us to reverse engineer an...

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MozillaCTF 2012 – Awesome Corp. Secured Ranges

This challenge entails reversing two (packed) Windows executables in order to retrieve an encrypted message. Once the algorithm and key generation method have been determined, a bruteforce search...

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Plaid CTF 2012 – SIMD

After examining some code retrieved by our operative we are unsure whether it was written by an evil genius or a google employee. We will let you decide. Title: SIMD (250) Category: Pirating For this...

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Plaid CTF 2012 – Override

One look in this program and our whole understanding of how robots run has been shaken. Maybe you will have better luck than us. Title: Override (300) Category: Pirating For this challenge we had to...

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