GreHack

GreHack is a hacking & scientific infosec conference in Grenoble, France. Nov. 28 & 29, 2025

[GreHack @GrehackConf]

It's D-Day! 🔥

The first day of the GreHack conference is already well underway! Today, we are welcoming nearly 500 participants to the beautiful mountains of Grenoble. 🏔️

Participants, feel free to stop by the various stands to chat with them during the breaks!

[GreHack @GrehackConf]

🎤 Final #GreHack25 Rumps recap 🙌

• Argit Janaqi “How Private Is VeraCrypt Activity (On Windows)”
https://t.co/kEW2aZhEde

• Lucas Parsy (Tuxlu) “Grenoble Hackerspace”
https://t.co/yHQ0PGgTud

• @Ruulian_ “How I Seduced My Girlfriend Using The FCSC”
https://t.co/JGvBVVyNzJ

[GreHack @GrehackConf]

Guess who’s back 👀
Missed us? Because we definitely missed you !
If you’re already looking forward to the next #GreHack, we’ve got something for you.
Starting today, we’ll be dropping talks from last November’s edition, one video at a time 🎤
Let’s relive it together 🔥

[GreHack @GrehackConf]

🎤 First #GreHack25 Rumps recap !

• @biero_el “Setup And Tune An OT SOC”
🎥 https://t.co/6pE46OvQHT

• @biero_el “Reading Serbian In JS At 3am”
🎥 https://t.co/JYLVwbZ8cY

• @klcium “I DT_NEEDED Help! How Not To Inject A Dependency”
🎥 https://t.co/sED9l9nXI7

[RandoriSec @RandoriSec]

Once again, RandoriSec sponsored @GrehackConf and several RandoriSec consultants attended the conference.

This blog post goes over a few of our favourite talks.
https://t.co/bCXBytCdwZ

[GreHack @GrehackConf]

cc @pagedout_zine

[GreHack @GrehackConf]

✨A quick look back at something special from #GreHack25

Paged Out! was in this year’s goodies, a free, one-article-per-page publication covering programming, security and more. Fast to read, fun to explore, packed with content!

Check them out here : https://t.co/xlmiYUtTlT 😄

[Gynvael Coldwind @gynvael]

You can write '2' (0x32) anywhere in the filesystem of a Linux-based network switch. How do you get root?

That's basically what my talk at @GrehackConf was about - enjoy!
https://t.co/KRJSndycqm https://t.co/Nz8pRnBvwZ

[GreHack @GrehackConf]

Thanks to everyone for making the CTF such an enjoyable experience! Please remember to keep the spirit of respect towards others at all events, this helps everyone have a great time.

[GreHack @GrehackConf]

🎉The #GreHack25 CTF has come to a close!

We hope everyone enjoyed the challenges and had a great time testing their skills. Huge congratulations to all participants for diving in, and a special shout-out to the top 4 teams for their performance! We hope you enjoy the prizes 🏆

[GreHack @GrehackConf]

A big thank you to the organizers for making the event possible, and to https://t.co/KuRxfO34WB for supporting the infrastructure alongside the GreHack team. A few hiccups came up during the event, and a detailed recap will be published soon to explain what happened.