advent-of-cyber-2025

Advent of Cyber 2025 – Writeups

Welcome to the Cyber Security Club, ITNU’s collection of Advent of Cyber 2025 writeups.
This site provides simple, easy-to-follow explanations for each day’s challenge from TryHackMe’s annual beginner-friendly cybersecurity event.

Advent of Cyber is a great way to start learning cybersecurity through short, guided, hands-on tasks released daily throughout December.

🔗 Official Event: https://tryhackme.com/adventofcyber25
💬 Support Group: https://chat.whatsapp.com/LThiQw5N6AdDrMxyVrSFjS
(For support, please contact through chat only—no calls.)

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📚 Writeups Index

Below is the list of daily writeups. Each link will take you to the detailed solution for that day.

• Day 0 – Getting started & Setup
• Day 1 – Linux CLI
• Day 2 – Phishing
• Day 3 – Splunk
• Day 4 – AI in Security
• Day 5 – IDOR
• Day 6 – Malware Analysis
• Day 7 – Network Discovery
• Day 8 - Prompt Injection
• Day 9 – Password Cracking
• Day 10 – SOC Alert Triaging
• Day 11 – XSS
• Day 12 – Phishing
• Day 13 – YARA Rules
• Day 14 – Containers
• Day 15 – Web Attack Forensics
• Day 16 – Registry Forensics
• Day 17 – CyberChef
• Day 18 – Obfuscation
• Day 19 – ICS/Modbus
• Day 20 – Race Conditions
• Day 21 – Malware Analysis
• Day 22 – C2 Detection
• Day 23 – AWS Security
• Day 24 – Exploitation with CURL

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🤝 Maintained By

Cyber Security Club, ITNU