CTF OPS
Fixers all over the city need a runner. Every contract is a hacking challenge generated just for you:
ciphers, hidden data, leaky web pages, firmware and logic puzzles. Find the flag like NULLWIRE{…},
submit it, take the points. Solve them in a row for a streak bonus, and come back every day for the
daily contract. Real techniques, fictional targets.
▸TRAINING · LEARN TO THINK LIKE A RUNNER
New to CTFs? Each training is a practice contract where a fixer talks you through it step by step: what to look at, what to try first, how to check yourself. No login, not scored.
Field guide: what am I looking at, and what do I try?
The loop that cracks almost every contract: read the brief (it tells you what kind of thing it is) → look (which characters? what's kept, what changed?) → try the cheapest idea first → check: does it look like NULLWIRE{…}? If not, it's another layer: go round again.
NO UPLINK
Log in to take contracts. Every one is generated just for you, with your own flag.
Contacting fixers…
1TAKE A CONTRACT
2NO ACTIVE CONTRACT
Take a contract on the left. Harder contracts pay more, and every three solves in a row add a 10% bonus (up to +50%).
3CONTRACT BOARD
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4FAIR PLAY
- One contract at a time. Abandoning one resets your streak.
- 5 wrong flags and the contract burns. Think, don't guess.
- The server times every contract. Faster than a human can read and solve it means no points, and repeated "too fast" solves pause the account. Bots aren't welcome.
- Limits per day: a maximum number of contracts, and a Creds cap. XP and leaderboard points keep counting.
- Tools that help: your browser's developer tools (F12), a text editor and CyberChef.
- Scope: only your contract files. Everything else on NULLWIRE is off-limits (real bugs: Report a vulnerability). Every flag is personal: someone else's flag earns nothing and is logged.