Hacking Challenges
Test your skills with CTF-style challenges
Start Hacking Real Servers
Create a free account to track your progress, start lab machines, and compete on the global leaderboard.
HackerDNA CTF challenges are bite-sized, capture-the-flag puzzles covering cryptography, digital forensics, reverse engineering, web security, OSINT and steganography. Each challenge has a single flag to find, so you get fast, focused practice on one skill at a time.
New challenges are added regularly and range from beginner-friendly to genuinely hard. Sign up free to submit flags, earn XP and see how you rank against ethical hackers worldwide.
Recommended Challenge
9211 players
50 XP
Name
Attack Terminal
Difficulty
XP
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