The ckriellideon 🔥

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Resume

Non-Professional guesser reverser and try-hard generalist CTF player (no-OSCP | no-OSCE | no-CRTP | no-eCPPTv2 | no-CRTO | no-GPEN | no-CEH | no-Comptia Sec+)

Typical Info

  • Handle: ckrielle
  • Country: Greece
  • Non-Native Languages: English
  • Previous/Current CTF Teams: Th3Os, ECSCTeamGreece
  • Main Category: Reversing
  • Secondary Categories: Pwn, Misc (Misc, Forensics, Stego)

Background

I’ve been playing CTFs for around 3 years. Started security during 2019 but nothing fancy, I’d say I mostly started Ferbruary-March 2021 (when I stopped doing university for 1.5 years hahahaha). I started with Crypto since I liked math, and Rev since I liked low-level concepts. Until I got into a team I mostly played solo. At some point I got burned out with and stopped playing Crypto, because I didn’t think it was worth investing my time in it for long-term (don’t want to become a mathematician hahaha). So I switched to Rev as my main category during early 2023. I am also currently learning Pwn since I intend to go into vulnerability research. Other than that I also play Misc stuff, (Misc, Stego, Stego :wink:) and have an interest in Hardware, Blockchain, and MalDev. I also have experience in AD CTFs.

Notable CTF Participations

  • Onsite Finalist with idek at MidnightSun CTF 2024 in Stockholm
  • National ECSC seniors qualifiers 2024 - 2nd place
  • Cyber Security Challenge Greece 2024 - 1st place with Zer0Tolerance
  • HTB Uni CTF 2023 - 10th Place (Uni)
  • CSAW 2023 Embedded Security Challenge - 3rd Place with Th3Os (paper)
  • ECSC 2023 - 11th place
  • National ECSC seniors qualifiers 2023 - 4th place
  • ECSC 2022 - Chosen as Replacement
  • National ECSC seniors qualifiers 2022 - 3rd place

Misc Facts

  • Authored multiple HTB challenges. You can see them on my (profile)
  • Currently working as a code auditor for a research team on blockchain projects
  • Some security related github projects I have are TokenStealer and a CVE-2019-16784 POC
  • Some of my hobbies outside of security are playing the violin, reading books with a big interest on history and deep exploration of the psychological and philosophical questions of the human condition, and reading manga

Professional Resume

Can be found here. If you are looking at it for potential recruitement, feel free to express your interest in any opportunities you have.