CTF platforms

Links to available CTF platforms to put skills and tools to the test

Always Online

Crackmes.onecrackmes.one

Reverse engineering CTF challenges

Defend the Webdefendtheweb.net

Level by Level with increasing difficulty - Tests your web app hacking skills

Microcorruptionmicrocorruption.com

Specifically challenges geared towards embedded devices

Cyber Mastery: Community Inspired. Enterprise Trusted.Hack The Box

Red Team platform with OSINT, DFIR, Crypto etc. challenges

MysteryTwister - The Cipher Challenge Contestwww.mysterytwisterc3.org

Cryptography based CTF challenges

OverTheWire: Wargamesoverthewire.org

Level by Level with increasing difficulty - Provides training on essential CLI techniques

http://pwn.eonew.cn/pwn.eonew.cn

Reverse engineering - Binary exploitation CTF challenges

SmashTheStack Wargaming Networksmashthestack.org

Level by Level with increasing difficulty - Provides training on essential CLI techniques

TryHackMe | Cyber Security TrainingTryHackMe

Similar to HackTheBox but provides more of a hand-holding tutorial based experience

http://reversing.kr/reversing.kr

Reverse engineering CTF challenges

Viblo CTF | Hack The Brain - Capture The FunViblo CTF

CTF with challenges and educational resources

Google CTFcapturetheflag.withgoogle.com

Hacker101 CTFctf.hacker101.com

XSS gamexss-game.appspot.com

An Educational CTF style for XSS

Self-Hosted

https://github.com/bkimminich/juice-shopgithub.com

Not technically a CTF but is a purposefully vulnerable web app designed to test your abilities at attacking the OWASP top ten

GitHub - rapid7/metasploitable3: Metasploitable3 is a VM that is built from the ground up with a large amount of security vulnerabilities.GitHub

Virtual machine used to train and practice MetaSploit techniques. Provided by Rapid7.

Vulnerable By Design ~ VulnHubwww.vulnhub.com

Collection of virtual machines with purpose built vulnerabilities