What is CTF?
CTF (Capture the flag) is a team game, the main goal of which is to capture the "flag" from the opponent. Capture the flag format can be used in paintball, roleplaying, and computer games. In information security, this is a term that once migrated from the terminology of shooters, in which several teams of players protect their IT infrastructure from attacks from rivals, while trying to disable their services, or while solving non-trivial tasks, they are trying to find a previously hidden phrase (flag).
Which CTFs to play?
If you can't find where to practice, try looking at tasks at ctftime.org.
If you don’t find, we have selected for you a list of sites with various tasks, vulnboxes and services:
- https://junior.stillhackinganyway.nl/
- https://academy.hackaflag.com.br/
- http://ctf.infosecinstitute.com/
- https://captf.com/practice-ctf/
- https://www.hacksplaining.com/
- http://www.hackthissite.org/
- https://www.hacking-lab.com
- https://defcon2018.ctfd.io/
- https://ctf.hacker101.com/
- https://attackdefense.com/
- https://exploit.education/
- https://immersivelabs.com/
- http://ctf.komodosec.com/
- http://freehackquest.com/
- https://cmdchallenge.com/
- https://www.root-me.org/
- https://www.vulnhub.com/
- https://ctf.hackucf.org/
- https://cryptopals.com/
- https://tryhackme.com/
- https://hackthebox.eu
- https://w3challs.com/
- http://ctflearn.com/
- https://365.csaw.io/
- http://reversing.kr/
- https://picoctf.com/
- https://ctf365.com/
- http://hax.tor.hu/
- http://pwnable.tw/
- https://hack.me/
