Feb 22 · 11 min read · Challenge Description Welcome to the Storybook Workshop! In this post, we are going to break down Cider Vault, an incredibly well-designed CTF challenge that serves as a masterclass in modern Linux he
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Feb 8 · 3 min read · Challenge Walkthrough 1. Introduction In this challenge, we are presented with a Tic-Tac-Toe game written in C. The game uses a "Minimax" algorithm, which is a mathematical way for a computer to play perfectly. Under normal circumstances, you can onl...
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Feb 8 · 3 min read · Detailed Walkthrough The challenge provides us with a Python script, chall.py, and a ciphertext file, ct.txt. Our goal is to reverse the encryption process to recover the flag. Analyzing the Encryption Script We begin by examining the logic in chall....
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Jan 1 · 8 min read · Challenge Description Category: ForensicsAuthor: qvipin Our threat intel team has been tracking KRAMPUS SYNDICATE for months now. Last week, we finally caught a break. We intercepted a file transfer between two of their operatives, some kind of encry...
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Jan 1 · 10 min read · Challenge Description Category: ForensicsAuthor: a_person9852 The North Pole’s internal systems are in a fragile state. Your task is to harden a compromised Windows 11 virtual machine before KRAMPUS SYNDICATE activity escalates further. You are provi...
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Jan 1 · 3 min read · Challenge Description Category: MiscellaneousAuthor: qvipin KRAMPUS SYNDICATE managed to get one of their operatives hired as an external contractor at NPLD's cloud infrastructure team. They've been given minimal access, but NPLD's IAM policies are.....
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Jan 1 · 9 min read · Challenge Description Category: Binary ExploitationAuthor: _avyra The Krampus Syndicate relies on small, deliberate changes to control systems without replacing them. This binary was used during an intrusion to apply a precise modification to an exis...
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Jan 1 · 4 min read · Challenge Description Category: Web exploitationAuthor: thee2d Modern authentication relies on more than just a password. Something you know, something you have, and something you are. Together, they're meant to provide layered security that can with...
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Jan 1 · 4 min read · Challenge Description Category: CryptographyAuthor: 7000x887143 A quiet morning never lasts long at North Pole Security. Your console lights up with a new message from Jingle McSnark. He writes:“Since you somehow solved my last challenge I made somet...
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Jan 1 · 6 min read · Challenge Description Category: CryptographyAuthor: flocto The Krampus Syndicate proudly claims their new signing service uses "bitcoin-level encryption" and industry-standard elliptic-curve cryptography. According to their engineers, the system is m...
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