This repo contains sources for justCTF 2022 challenges hosted by justCatTheFish as well as summary of winners and sponsors of the event.
TLDR: Run a challenge with ./run.sh (requires Docker/docker-compose and might require sudo as we use nsjail extensively under the hood).
The challenges/ contains challanges directories with the following structure:
README.md- official challenge description used during CTFrun.sh- shell script to run the challenge locally (uses Docker and sometimes docker-compose)public/- files that were public/to downloadprivate/- sources and other unlisted filesflag.txt/metadata.json- the flag (don't look there?)solv/- scripts and files with raw solution (used by healthcheck, if exists)- other files
-
1st place - C4T BuT S4D - $3200 + 1x Binary Ninja Personal
-
2nd place - Never Stop Exploiting $1500 + 1x Binary Ninja Personal
-
3rd place - 0ops - $1000 + 1x Binary Ninja Personal
-
4-8th place - DiceGang, r3kapig, Water Paddler, idek - 1x Binary Ninja Personal
-
We also give a 1x Binary Ninja Personal license for the best writeup that uses Binary Ninja
-
We also provided $50 for each of the two unsolved challenges to the first winners
- Sumo Logic - https://www.sumologic.com/
- Trail of Bits - https://www.trailofbits.com/
- Vector35 (Binary Ninja) - https://vector35.com/
Thanks again to all the sponsors who made this event possible!
(Sorted from most solved to least solved)
| Category | Name | Points | Solves |
|---|---|---|---|
| Misc | Sanity Check | 50 | 316 |
| Misc | Bifurcation (ppc) | 103 | 121 |
| Web | Symple Unzipper | 225 | 40 |
| Crypto | Frosty | 228 | 39 |
| Pwn | Notes | 256 | 30 |
| Crypto | Simply Powered | 260 | 29 |
| Pwn | arm | 267 | 27 |
| Crypto | fROSty's Second Signature Scheme | 275 | 25 |
| Misc | Hardware Screen | 279 | 24 |
| Re | I'm slow | 283 | 23 |
| Web | Velociraptor | 288 | 22 |
| Misc | Radio Ga Ga | 288 | 22 |
| Web | GoBucket | 308 | 18 |
| Misc, Pwn | dumpme | 333 | 14 |
| Pwn | Skilltest | 340 | 13 |
| Web, Misc | gitara | 347 | 12 |
| Pwn | League of Lamports | 373 | 9 |
| Web | Baby XSLeak | 394 | 7 |
| Re | AMXX | 406 | 6 |
| Re, Pwn | Monsters | 406 | 6 |
| Web | Foreigner | 420 | 5 |
| Pwn | herpetology | 435 | 4 |
| Web, Misc | Web API intended | 435 | 4 |
| Re, Misc | Fancy Device | 453 | 3 |
| Web | Ninja | 500 | 1 |
| Pwn | Dark SOLs | 500 | 0 |
| Web | Dank Shark | 500 | 0 |
Write-ups can be found on CTFTime. You should also look at challenges solution directories, if they exist (solv/).
We wrote our own CTF platform which is available here.