Some Useful Resources

Here there are some sites with free challenges to practice different skills. Share in case it could be useful for someone.

CTFs

• https://CTFtime.org

Cloud

• http://flaws.cloud/
• http://flaws2.cloud/
• https://github.com/RhinoSecurityLabs/cloudgoat

Crypto

• https://cryptopals.com/
• https://cryptohack.org/

Docker

• https://notsosecure.com/vulnerable-docker-vm/

Exploiting

• http://pwnable.kr/
• http://exploit.education/
• https://ropemporium.com/
• https://github.com/shellphish/how2heap

Misc

• https://overthewire.org/
• https://www.root-me.org/
• https://ctflearn.com/
• https://ringzer0ctf.com/
• https://tryhackme.com/
• https://w3challs.com/
• http://gracker.org/

Powershell

• https://www.underthewire.tech

Programming

• https://github.com/donnemartin/interactive-coding-challenges

Pentest

• https://www.hackthebox.eu/
• https://www.vulnhub.com/
• https://www.cyberseclabs.co.uk/

Reversing

• https://challenges.re/
• https://github.com/ytisf/theZoo
• http://reversing.kr/

SysAdmin

• https://github.com/trimstray/test-your-sysadmin-skills

Web

• https://portswigger.net/web-security
• https://ctfchallenge.co.uk
• https://pentesterlab.com/exercises
• https://ctf.hacker101.com/
• https://xss-game.appspot.com/
• http://www.dvwa.co.uk/
• https://google-gruyere.appspot.com/
• https://xss.pwnfunction.com/
• https://github.com/tegal1337/0l4bs
• https://application.security/free-application-security-training

Feel free to comment if I forgot something.