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greyhats23

GreyCTF 2023 Finals

Participated as ヨミビトシラズ (lit. author unknown) with some friends for fun, we hit 8/15th. It was a lot of fun meeting everyone.

Writeups are available on my blog and solve scripts are in this repo.

Solves

Challenge Category Value Time
AES confusion Crypto 2 320 July 16th, 5:23:55 PM
fast af calculator Pwn 2 240 July 16th, 4:11:29 PM
Battleships Web 2 260 July 16th, 3:34:15 PM
Game Misc 2 220 July 16th, 3:26:46 PM
OTP 2 Crypto 2 400 July 16th, 3:14:11 PM
Continuous Nim Misc 2 320 July 16th, 11:58:54 AM
POTP Crypto 2 400 July 16th, 11:34:17 AM
Tempat Makan Misc 2 220 July 16th, 10:59:03 AM
OTP Crypto 2 220 July 16th, 10:38:24 AM
Cards Misc 2 220 July 16th, 10:30:40 AM
#GreyCTF Misc 2 220 July 16th, 10:14:10 AM
Web-Azzembly Rev 1 220 July 15th, 5:09:17 PM
Feedback Misc 1 220 July 15th, 3:02:18 PM
Custom Protocol Web 1 220 July 15th, 2:34:13 PM
Baby Feistel Crypto 1 300 July 15th, 2:33:06 PM
warmup Pwn 1 300 July 15th, 2:17:38 PM
StackVM Misc 1 240 July 15th, 1:50:44 PM
MyHTMLSanitizer Web 1 220 July 15th, 12:22:28 PM
Face Unlock Misc 1 220 July 15th, 11:37:06 AM
Brooooo Misc 1 220 July 15th, 10:46:01 AM

Scoreboard

Place Team Score
1 no rev/pwn no life 9500
2 DiceGang 8430
3 Social Engineering Experts 8370
4 NUSHmallows 8060
5 u0K 7090
6 purf3ct 6960
7 🦈 SLIGHT_SHARK 🙂 6600
8 ヨミビトシラズ 5200
9 Penguin 5040
10 idek 4980
11 ItzyBitzySpider 4400
12 Team Berries 4260
13 youtiaos 3900
14 VMP 3600
15 MATE 3600