CTF Writeups

Forensics, malware analysis, incident response, and more from competitions worldwide.

CTF Writeup

Securinets 2025 — Lost File

Ransomware-style challenge requiring memory capture analysis and reverse engineering of an encryption tool to recover a deleted key.

CTF Writeup

Securinets 2025 — Recovery

Analysis of a DNS-based covert channel used for data exfiltration and ransomware delivery. Includes malware reconstruction and custom LCG decryption.

CTF Writeup

Securinets 2025 — Silent Visitor

Investigation of a malicious npm package and its Go-based payload through Windows disk image analysis.

CTF Writeup

Securinets CTF Quals 2025 — Overview

Detailed overview of the Securinets CTF Qualifications 2025. Competed with Team Mojo Jojo and achieved 38th place (5th in North Africa). This documents the overall event and links to detailed challenge writeups.

Walkthrough

Memory Forensics with Volatility 3

A complete beginner-to-intermediate guide to memory forensics using Volatility 3. Covers installation, essential plugins, process analysis, network artifact extraction, and memory-resident malware hunting.

CTF Writeup

QnQSec 2025 — Masks

Tracing a phishing attack chain from initial email delivery in Outlook to scheduled task persistence using Volatility 3 and AmCache forensics.

CTF Writeup

QnQSec CTF 2025 — Overview

Overview of forensics challenges from QnQSec CTF 2025, covering memory forensics with Volatility 3, phishing incident response, and Living Off The Land (LOTL) techniques.