GCC2024

GCC CTF 2024 is an online CTF organized by GCC (Galettes, Cidre, CTF), a CTF club from the ENSIBS school. The CTF is open to everyone and is held from the 1st to the 3rd of March 2024. I played with the S’hydrat team under the name Sérendipité.

The challenges and some writeups are available at the official GCC CTF 2024 repository.

Scoreboard

Scoreboard

Challenges

Crypto

Name	Points	Tags
GCC News	100	`Crypto`
SuperAES	404	`Crypto`
Elliptic	471	`Crypto`
Too Many Leaks	397	`Crypto`
Trust Issues	500	`Crypto`

Forensic

Name	Points	Tags
BipBipBiiip	100	`Forensic`
Pretty Links	348	`Forensic`
Fill the library	458	`Forensic`
Threat analysis	467	`Forensic`

Misc

Name	Points	Tags
Legerdemain	381	`Misc`
Bad Habit	431	`Misc`
Diabolical Grumpy Analyst	431	`Misc`
GCC Online	475	`Misc`
SoBusy	436	`Misc`
Legerdemain Revenge	404	`Misc`

OSINT

Name	Points	Tags
But they so tasty … 😔🍰	267	`OSINT`
Music from the city	267	`OSINT`
On the loose [1/2]	453	`OSINT`
On the loose [2/2]	490	`OSINT`

Pwn

Name	Points	Tags
Cuttin’String	329	`Pwn`
Baby bof	453	`Pwn`
Flag Roulette	497	`Pwn`

Reverse

Name	Points	Tags
rAnSoM	100	`Reverse`
GCC Chat 1/2	339	`Reverse`
GCC Chat 2/2	467	`Reverse`
Array programming rocks	431	`Reverse`
Warp jump	453	`Reverse`

Web

Name	Points	Tags
Find The Compass	100	`Web`
frenzy flask	100	`Web`
Free Cider	299	`Web`
The Genie’s pwn adventures	381	`Web`
Free Chat	490	`Web`
MLWeb	481	`Web`
The Genie’s pwn adventures revenge	458	`Web`

Web3

Name	Points	Tags
Synthatsu katana thief	299	`Web`
First drop	458	`Web`
TOOTB	492	`Web`
Pincer	498	`Web`
Ode	494	`Web`

SuperAES