I’m ren, or sometimes, zeynarz, and I’m very passionate about computer science & hacking, as well as robotics & engineering. I’m really interested in making and breaking technology, and understanding how they work under the hood.

I enjoy creative problem solving a lot, and like to play hacking competitions called ctfs . I mainly play ctfs with the international ctf team thehackerscrew, but sometimes I play solo as well. I mainly do pwn / binary exploitation, and like to practice on websites like pwnable.tw.

Nowadays, I’m spending most of my free time doing robotics in my school’s robocon team.

Projects

  • AES Messenger: Terminal messaging app that encrypts user messages using AES. Used this project to get more comfortable with C and learn about AES. Written in 2021.
  • nand2tetris: Did an applied computer science course called nand2tetris, and built a computer. Made a custom (virtual) computer called Hack, using logic gates. Wrote an assembler for the computer in python. Wrote a VM translator for compiling an intermediate language to the computer’s assembly in python. Wrote a compiler for a custom language called Jack in python, and implemented operating system library functions using Jack. (The attached link is a link to some of the thoughts and notes I’ve written down while doing the course, as the course instructors specifically requested on their page to not post solutions publicly. If you do wish to see the code, just dm me, its in a private repo on my github.) Did the course in 2021.

Experiences

some of the things that I have done

ctfs

achievements in ctfs that I played in and contributed

2023

  • [solo] 8th in CODEGATE junior finals @ Seoul, South Korea
  • [thehackerscrew] 11th in ISITDTU CTF finals @ Da Nang, Vietnam
  • [thehackerscrew] 5th in Imaginary CTF
  • [thehackerscrew] 10th in SEETF
  • [thehackerscrew] 13th in GrayCTF Qualifiers
  • [thehackerscrew] 13th in HITCON CTF Qualifiers
  • [ScrewTolerance] 11th in WACON CTF Prequal
  • [solo] 10th in Wargames.MY CTF (professional category)

2024

  • [thehackerscrew] 4th in LakeCTF finals @ EPFL, Lausanne, Switzerland
  • [Kopi Cincau] 12th in HackTheOn Finals (Advanced) @ Sejong-si, South Korea
  • [Kopi Cincau] 10th in HackTheOn Preliminaries (Advanced)

others

  • Global Cybersecurity Camp 2024 (GCC) @ Chon Buri, Thailand
  • Trainer about pwn 101 for Level-Up Event @ IIUM, Gombak, Malaysia
  • MCO 2024 Training Camp @ UTAR, Sungai Long, Malaysia
  • top 150 on pwnable.tw (last checked Jun 2024)
  • Malaysian Computing Challange 2023 (MCC) Silver Award (Senior Category)