Keep talking and everybody explodes writeup – OmniCTF 2026 Finals
This is a writeup & guide to the hardware hacking challenge I made, Keep talking and everybody explodes, from the finals phase of OmniCTF 2026. It was pretty fun to create it. It was a challenge by itself to make 14 identical boxes people could solve. The guide and everything else you need to make […]
Claudiu $lot$ writeup – OmniCTF 2026 Finals
This is a writeup for the challenge Claudiu $lot$, an AI hacking challenge I created for the Finals phase of OmniCTF 2026. We are given a Discord bot that has AI in the backend, and a command we can run on the AI, /roll. By running /roll in the dedicated channel for the challenge or […]
A mysterious codex writeup – OmniCTF 2026 Quals
This is a writeup for the challenge “A mysterious codex”, from the qualification phase of OmniCTF 2026. This is an AI hacking CTF challenge. You are given just a Discord bot who is connected to an AI agent in the backend. It can respond, it can run commands in a sandbox and do even more […]
2nd place at Unbreakable Braila
After my SAT exam Saturday morning, I drove from Bucharest to Braila to participate to Unbreakable. It was really fun. … and my brother got the 4th place 🙂 Matei Ferseta 🍁– 12th-grade student at Colegiul Național de Informatică “Tudor Vianu” – President of Vianu Cybersecurity Club – Trainer at Atlantykron – Volunteer at Astrofest, […]
I just obtained C-AgAIPen Certification
When I was at DefCon 34 last week, in Las Vegas, I got a proposal to obtain this Certified Agentic AI Pentester status. So, after some gruesome working exam hours, I did it. And I’m proud of it. 🙂 Matei Ferseta 🍁– 12th-grade student at Colegiul Național de Informatică “Tudor Vianu” – President of Vianu […]
Bronze Medal at National Digital Innovation and Creation Olympiad, 33rd edition, Focsani + interesting fact
This week, me and my brother, Stefan Ferseta, won the Bronze Medal at one of the oldest IT Olympiads, national level: Digital Innovation and Creation Olympiad. One cool fact. To support our project, we printed several QR codes and stick them in Focsani city and in the college that hosted the event. In less than […]
1st place Binary Track at Security Summer School, Bucharest Polytechnic University
Saturday, July 25 2026, together with my friend and colleague George Lupu (Vianu Cybersecurity Club) we made a team that won 1st place at Binary Track at Bucharest Polytechnic University Security Summer School. Here is the final pic with all the participants. Can you see me in that crowd? 🙂 Matei Ferseta 🍁– 12th-grade student […]
35th place at Grey Cat The Flag, Singapore
This weekend our team (vianu_hack) reached 35th place out of 418 at one of the greatest CTF competition in Singapore: Grey Cat The Flag 24 hours. Great team. Matei Ferseta 🍁– 12th-grade student at Colegiul Național de Informatică “Tudor Vianu” – President of Vianu Cybersecurity Club – Trainer at Atlantykron – Volunteer at Astrofest, Hallo […]
We qualified for the national level at Infoeducatie Olympiad with Lab Vianu Hack Educational Platform!
Our purpose with https://lab.vianuhack.club is to help Romanian teens increase their proficiency in cybersecurity. This way, our country will be stronger. So far, we qualified at Infoeducatie Olympiad for the national level with this project. During this summer we’ll go to Focsani, to present it. Until then, we hope to have some time to improve […]
Trainer at Cyb3r-Q Stack 2026
Matei Ferseta 🍁– 12th-grade student at Colegiul Național de Informatică “Tudor Vianu” – President of Vianu Cybersecurity Club – Trainer at Atlantykron – Volunteer at Astrofest, Hallo Fest, Sci-Fi Fest, Poli Fest – Pseudo-Owner of Bacon, my cat. More about me here. mapleleaf.ro