© 2026 Hashnode
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...

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....

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...

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...

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...

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...

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.....

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...

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...
