h x p
<<39C3
The CTF is over, thanks for playing! hxp <3 you! 😊
This is a static mirror, we try to keep files online, but all services will be down.
Stalk us on Mastodon | @hxp@infosec.exchange
cassandra-von-hxp
by katharina and hlt
Difficulty estimate: 
- hard
Points: round(1000 · min(1, 10 / (9 + [37 solves]))) = 217 points
Description:
🤡 dev for 🤡 software
Use the flag for orakel-von-hxp as the decryption key for the download:
echo -n 'hxp{the_flag}' | openssl aes-256-cbc -pbkdf2 -iter 100000 -salt -d -pass stdin -in cassandra-von-hxp.tar.xz.enc -out cassandra-von-hxp.tar.xz
Hint: The flag is continously input on UART1.
Download:
cassandra-von-hxp-613afe08cd50129a.tar.xz.enc (54.2 MiB)
Connection (mirrors):
nc 5.75.155.137 1338
Solved by:
| # | Team | Time |
|---|---|---|
| cassandra-von-hxp released | 2025-12-28 14:49:36 +0000 UTC | |
| 🥇 | Redback Crawlers Ensemble | 2025-12-28 15:30:53 +0000 UTC |
| 🥈 | PwnSec | 2025-12-28 15:40:27 +0000 UTC |
| 🥉 | mhackeroni | 2025-12-28 15:45:04 +0000 UTC |
| 4 | More Smoked Leet Chicken | 2025-12-28 16:08:13 +0000 UTC |
| 5 | Marcio Herobrine | 2025-12-28 16:17:37 +0000 UTC |
| 6 | The Flat Network Society | 2025-12-28 16:50:06 +0000 UTC |
| 7 | dizziness | 2025-12-28 17:27:26 +0000 UTC |
| 8 | WROng_flag | 2025-12-28 17:32:06 +0000 UTC |
| 9 | infobahn | 2025-12-28 17:50:02 +0000 UTC |
| 10 | Kalmarunionen | 2025-12-28 17:57:53 +0000 UTC |
| 11 | FluxFingers | 2025-12-28 18:17:30 +0000 UTC |
| 12 | L.A.R.P. | 2025-12-28 18:42:57 +0000 UTC |
| 13 | pasten | 2025-12-28 19:06:54 +0000 UTC |
| 14 | RootRunners | 2025-12-28 19:09:21 +0000 UTC |
| 15 | crazyman's friends | 2025-12-28 19:36:05 +0000 UTC |
| 16 | FMC | 2025-12-28 19:44:13 +0000 UTC |
| 17 | KuK Hofhackerei | 2025-12-28 20:21:01 +0000 UTC |
| 18 | W4llz | 2025-12-28 22:16:59 +0000 UTC |
| 19 | justCatTheFish | 2025-12-28 23:43:39 +0000 UTC |
| 20 | ACERGION | 2025-12-28 23:44:47 +0000 UTC |
| 21 | organisers | 2025-12-29 02:21:11 +0000 UTC |
| 22 | tjcsc | 2025-12-29 03:47:28 +0000 UTC |
| 23 | thehackerscrew | 2025-12-29 04:19:02 +0000 UTC |
| 24 | BunkyoWesterns | 2025-12-29 04:36:29 +0000 UTC |
| 25 | 31A | 2025-12-29 05:54:25 +0000 UTC |
| 26 | Dr3ad | 2025-12-29 08:11:28 +0000 UTC |
| 27 | NYUSEC | 2025-12-29 09:09:58 +0000 UTC |
| 28 | 0xfun | 2025-12-29 09:13:43 +0000 UTC |
| 29 | Caliphal Hounds | 2025-12-29 09:35:55 +0000 UTC |
| 30 | Hack@Sec | 2025-12-29 11:03:03 +0000 UTC |
| 31 | Never Stop Exploiting | 2025-12-29 11:04:52 +0000 UTC |
| 32 | H-T8 | 2025-12-29 11:20:56 +0000 UTC |
| 33 | Call the Team | 2025-12-29 12:07:12 +0000 UTC |
| 34 | AreDaYush? | 2025-12-29 15:28:00 +0000 UTC |
| 35 | Black Bauhinia | 2025-12-29 16:33:55 +0000 UTC |
| 36 | Dragon Sector | 2025-12-29 16:51:55 +0000 UTC |
| 37 | botz_dam | 2025-12-29 17:07:23 +0000 UTC |