Gyeongje Oh

Offensive Security Researcher

Education

KYUNGHEE UNIVERSITY 2019.03 - Now (w/ army service)
B.S. in Department of Software Convergence

Work Experience

HAYYIM SECURITY - Security Researcher 2022.03 - 2023.12
Finding vulnerabilities and Exploit in software (Browser, Office, VM, RDP, etc)

External Experience

PWNLAB - Intern 2023.04 - Now
Kyunghee University Department of Computer Engineering (Advisor: Prof. Daehee Jang)

BEST OF THE BEST 7th - Student 2018.03 - 2019.02
Vulnerability Analysis Track (C/O)

Information Security Gifted Education Center - Student 2017.03 - 2017.12
Advanced Professional Class B in Seoul Women’s University (C/O)

Hacking Competition (CTF) Awards

International

2024

6th, in HITCON CTF Final (Cold Fusion)
9th, in DEFCON 32 Final (Cold Fusion)

2023

4th, in HITCON Final (프로그램털모찌)
6th, in CODEGATE University Final (경희대미남해커들)
10th, in DiceCTF (HotIceAmericano) $100

2022

10th, in CODEGATE University Final (경희대미남해커들)
5th place in Samsung Hacker's Playground (KoreaNumberOne)

2018

9th, in CODEGATE Junior Final (오경제)

Domestic

2024

Excellence Award, in LG U+ Hacking Competition (리버서구해요) $3,000
Special Award, in AutoHack Hacking Competition (오똑핵)
Special Award, in FIESTA Hacking Competition (학석박입니다) $400
Excellence Award, in HackTheon Sejong Hacking Competition (QWER) $3,000

2022

Excellence Award, in HackTheon Sejong Hacking Competition (라임도둑) $1,000

2021

2th, in Air Force Cyber Warrior Competition (오경제)

2018

Gold Award, in Information Security Olympiad (오경제) $1,000
1th, in PoC Hacking Camp CTF (7성사이다)

2017

4th, in Institute of Information Security Education for the Gifted CTF (오경제) $300
Bronze Award, in Information Security Olympiad (오경제) $300

Bug Bounty Award

KISA Bug Bounty Award
Remote Code Execution via Heap Overflow in Viewer (KVE-2023-0095, KVE-2023-5125) $3,100

Remarks

Republic of Korea Air Force 2020.04 - 2022.01
MOS: Information Security

Hacking Competition (CTF) Challenge Author/Organizer
2023/2024 International Drone Hacking Competition Author/Organizer
2022 KHU Software Security Competition Author
2017/2018 ROOTCTF Author/Organizer

Wargame
Reversing.kr (Gyeongje) All Clear
xcz.kr (Gyeongje) All Clear

*****

Contact: ogj0824@gmail.com

Gyeongje Oh Offensive Security Researcher