A collection of CTF source files and write-ups that anyone can contribute to. Did you just publish a CTF write-up? Let us know, and we'll add a link to your post — or just add the link yourself and submit a pull request. Spot an issue with a solution? Correct it, and send a pull request. Please read CONTRIBUTING.md. Archive Write-ups for CTFs that occurred in 2013 (this repository) Write-ups for CTFs that occurred in 2014 Write-ups for CTFs that occurred in 2015 Write-ups for CTFs that occurred in 2016
FEATURES
ALTERNATIVES
shellfirm will prompt challenges to verify risky shell commands, acting as a captcha for your terminal.
A comprehensive server cryptographic protocol analyzer with API and CLI interface.
A set of instructions for the Dalvik virtual machine to manipulate registers and values in Android applications.
A comprehensive collection of resources for learning ARM assembly language and shellcode development.
Unofficial Python API for searching, browsing, and downloading Android apps from Google Play.
Free tools for the CrowdStrike customer community to support their use of the Falcon platform.
Real-time capture the flag (CTF) scoring engine for computer wargames with a fun game-like environment for learning cybersecurity skills.
PINNED

ImmuniWeb® Discovery
ImmuniWeb Discovery is an attack surface management platform that continuously monitors an organization's external digital assets for security vulnerabilities, misconfigurations, and threats across domains, applications, cloud resources, and the dark web.

InfoSecHired
An AI-powered career platform that automates the creation of cybersecurity job application materials and provides company-specific insights for job seekers.

Mandos Brief Newsletter
A weekly newsletter providing cybersecurity leadership insights, industry updates, and strategic guidance for security professionals advancing to management positions.

Checkmarx SCA
A software composition analysis tool that identifies vulnerabilities, malicious code, and license risks in open source dependencies throughout the software development lifecycle.

Check Point CloudGuard WAF
A cloud-native web application and API security solution that uses contextual AI to protect against known and zero-day threats without signature-based detection.

Orca Security
A cloud-native application protection platform that provides agentless security monitoring, vulnerability management, and compliance capabilities across multi-cloud environments.

DryRun
A GitHub application that performs automated security code reviews by analyzing contextual security aspects of code changes during pull requests.

Wiz
Wiz Cloud Security Platform is a cloud-native security platform that enables security, dev, and devops to work together in a self-service model, detecting and preventing cloud security threats in real-time.