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Hello, I'm Eren.

My name is Eren ONDER. I am a 4rd-year Digital Forensic Engineering student and I actively work in the field of cybersecurity. As a CTF competitor, instructor, organizer, and researcher, I am pursuing a career path that is both technically deep and contributes to the community.
I have participated in CTF competitions at various levels and won awards, joined hackathons, organized competitions, and delivered technical training sessions. On the academic side, I carry out projects in the field of cybersecurity and support these studies through seminars and national projects.
My career goal is to become a security expert with a strong technical background in cyber attack and defense mechanisms. I aim to continuously learn and produce in both academic and social contexts.
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Formal Education

2022-2026
University of Firat
Digital Forensic Engineering, Technology Faculty

Experiences

09/2025 - now
Intern
OnBT. Istanbul, Turkey

Cyber Security - Intern FILL
07/2025 - 08/2025
Intern
Turkish Technology. Istanbul, Turkey

Network Management - Intern Analysis and evaluation of security architectures within Turkish Airlines’ corporate network infrastructure Contribution to Proof of Concept (PoC) studies for the protection of critical systems Detection, classification, and reporting of security incidents through SIEM solutions

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Volunteer Work

12/2023 - 09/2025

Chairman

Cybersecurity Community . Fırat University, Turkey

Cybersecurity Community - Chairman

I served as the chairman of one of the most active technical communities at Firat University who name is “Siber Güvenlik Topluluğu”. Leading a community with over 500 active members, I coordinated a management team of 20 and organized numerous technical, social, and career-oriented events.

Key Contributions

  • Took an active role in event planning, team management, collaboration, and communication with external stakeholders
  • Organized trainings, awareness activities, and CTF competitions in various areas of cybersecurity
  • Hosted career talks and technical conferences with leading industry experts
  • Arranged Code Night events where students could collaborate, share knowledge, and code together
  • Enhanced the club’s vision and built a community structure strong in both technical and social aspects
12/2023 - 07/2025

Event and Organization Coordinator

Cyber Anatolia Communities . Turkey

Cyber Anatolia Communities - Event and Organization Coordinator

I have been serving as an event and organization coordinator under the umbrella of the Cyber Anatolia Communities. This volunteer-based initiative brings together more than 35 university clubs and over 17,000 students across Turkey, aiming to raise cybersecurity awareness among students, promote knowledge and experience sharing, enhance individuals’ technical skills, and contribute to the development of conscious professionals in the field.

As part of this role, I actively participated in the planning processes of various events such as winter camps, online activities, and an international CTF competition held between Turkey and the United Kingdom.

08/2023 - 12/2023

Event and Organization Coordinator

Google Developer Student Club . Firat University, Turkey

Google Developer Student Club - Event and Organization Coordinator

I served as the event and organization coordinator at the Google Developer Student Club (GDSC), which represents Google in Elazığ, and played an active role in organizing various events related to technology, artificial intelligence, cybersecurity, and Google products.

In this role, I brought together students interested in technology and software development by organizing various technical events, seminars, and workshops. I was actively involved in the planning process of the events, including content planning, inviting speakers, and time management.

Activity

December 28, 2024

1st Place, HacktorX CTF

Led our team to victory in the HacktorX CTF competition by solving challenges in cryptography, network, web, OSINT, and reverse engineering.

June 25, 2023

2nd Place, ABMCTF

Secured 2nd place in the 2nd ABMCTF Capture The Flag competition by solving challenges across various cybersecurity domains.

July 3, 2024

3rd Place, ABMCTF

Competed in the 3rd ABMCTF Capture The Flag contest, solving complex cybersecurity challenges with our team “Black Team.”

April 23, 2024

3rd Place, HAVELSAN Hackathon (HAVELSAN EKSPRES)

Developed an AI-based Intrusion Detection System “Cyber MAIN” during a 4-day hackathon train journey. Awarded 3rd place among 26 university teams.

April 5, 2025

CTF Organizer, ABMCTF

Served as an organizer for the ABMCTF competition. Designed 30+ cybersecurity challenges across five categories to educate and challenge participants.

May 24, 2024

CTF Training Instructor, Code Night Event

Provided hands-on CTF training on Cryptology, Web, Network, and OSINT during a night-long event for students and cybersecurity enthusiasts.

March 27, 2024

Cybercrime Awareness Conference, Fırat University

Organized a seminar in collaboration with the Cyber Crimes Unit, focusing on social engineering, phishing, and safe internet use.

March 12, 2024

Cybersecurity Awareness Seminar, Yöntemim Schools

Held an engaging seminar on digital forensics and cybersecurity for high school students, including live demonstrations of cyber attack scenarios.

December 31, 2024

Cybersecurity Seminar, Ahmet Kabaklı Science High School

Delivered a seminar on cybersecurity and digital forensics engineering to high school students, focusing on raising awareness about digital threats.

May 2–4, 2024

Published Paper, IIC2024 Conference

Presented and published a paper titled “Real-Time Human Recognition With Random Forest Algorithm Using Gait Biometrics Images” at the 3rd International Informatics Congress.

December 20, 2024

Red Team Bootcamp & CTF Training, Fırat University

Organized and instructed advanced-level CTF training, covering multiple categories and hosting a mini competition.

January 1, 2024

TÜBİTAK 2209-A Project Recipient

Received national support for a project titled “AI-based Gait Biometrics for Person Identification in Forensic Cases.” Reached the semi-final stage in the 2023/2 term.

A selection of my work

Web 3.0 Cryptocurrency Transfer Site

I developed an application leveraging Web 3.0 technologies that enables users to securely and swiftly transfer cryptocurrency on the Ethereum network via their MetaMask wallets. Its user-friendly interface makes blockchain technology accessible to everyone.

See Project

Ryuk Ransomware

This project was developed to safely simulate and analyze how real-world ransomware operates within a controlled environment. Written in C#, this simulation uses AES encryption to lock files and places itself in system startup, accurately modeling the behavior of actual ransomware and providing a reliable test environment.

Note: This project was created solely for academic and educational purposes and must never be executed on real systems.

See Project

Fake Extension Builder

This project is a lightweight utility developed to obfuscate .exe file extensions by inserting the Braille Pattern Blank character (Unicode U+2800) just before the .exe suffix. The primary objective is to disguise the true nature of executable files in environments where basic file extension spoofing is relevant for educational, research, or cybersecurity awareness purposes.

See Project