Gyuho Lee
DFIR Specialist • Frontend Developer
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» extr |
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| Interested In | |
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» Cyber Threat Intelligence » Web Service Development » Tea & Whisky |
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| CERT, Bithumb Seoul, South Korea |
Feb 2025 - Present - |
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» Threat Intelligence & Incident Response |
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| Security Service Developer, NCSOFT Gyeonggi, South Korea |
May 2021 - Dec 2024 3 years, 8 months |
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» In-House Security Service Development & Operations » Internalized Server Security Solution Operation & Module Development |
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| DFIR Specialist, Plainbit Co., Ltd. Gyeonggi, South Korea |
Aug 2019 - May 2021 1 year, 10 months |
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» Assisted in digital evidence collection and analysis for multiple small to mid-scale incidents, including ransomware and APT attacks. » Developed automated analysis tools to enhance efficiency in constrained investigative environments. |
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| Senior Researcher, Culture Makers Seoul, South Korea |
Nov 2018 - Jul 2019 8 months |
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» Military Service (Skilled industrial Personnel) » Operated infosec-related competitions and produced educational contents(also infosec). » Managed v-networks using virtualization products(vSphere) and developed management tools related it. |
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| Security Researcher, SEWorks Inc. Seoul, South Korea / CA, United States |
Feb 2017 - Nov 2018 1 year, 10 months |
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» Military Service (Skilled industrial Personnel) » Developed automation tools for products operation and management of backend servers. » Developed modules to analyze malicious APKs. |
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| Software Vulnerability Analyst, WINS Co., LTD. Gyeonggi, South Korea |
Jan 2016 - Jan 2017 1 year |
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» Vulnerability research and 1-day vulnerabilities analysis on Microsoft products. » Developed malicious behavior analysis module included in APT attack detection appliance. » Reviewed appliance bug bounty reports. |
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| Security Researcher, Divine Security Gyeonggi, South Korea |
Jan 2015 - Jun 2015 6 months |
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» Developed modules to analyze malicious APKs. |
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| Security Consultant, ***** Seoul, South Korea |
Mar 2013 - Aug 2013 6 months |
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» Black-box and white-box penetration testing for software and web services. » G-ISMS and ISMS security consult support for security companies. |
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| Only showing the results of top 3 places and finalists of memorable CTFs, |
| International | ||
| 2020 | 1st place, InterKosen CTF | Japan |
| 2020 | 1st place, Defenit CTF | South Korea |
| 2019 | 1st place, Harekaze CTF | Japan |
| 2019 | 3rd place, DFRWS IoT Forensic Challenge, write-up | United States |
| 2018 | 2nd place, Digital Forensic Challenge 2018 | South Korea |
| 2017 | 2nd place, ASIS CTF Finals | Iran |
| 2017 | 3rd place, Volga CTF | Russia |
| 2016 | Finalist, TrendMicro CTF | Japan |
| 2016 | 2nd place, EKOPARTY CTF 2016 | Argentina |
| 2016 | 1st place, ASIS CTF Finals | Iran |
| 2016 | 1st place, Volga CTF | Russia |
| 2014 | Finalist, DEFCON 22 CTF | United States |
| Domestic | ||
| 2022 | Finalist, Cyber Conflict Exercise | Daegu, South Korea |
| 2019 | Finalist, Cyber Conflict Exercise | Busan, South Korea |
| 2015 | 1st place, 14th HUST Hacking Festival | Seoul, South Korea |
| 2015 | 1st place, Find the Digital Culprit | Seoul, South Korea |
| 2015 | 1st place, Inc0gnito Hacking Competition | Seoul, South Korea |
| 2014 | 3rd place, Find the Digital Culprit | Seoul, South Korea |
| 2013 | 3rd place, Whitehat Contest | Seoul, South Korea |
| 2013 | 3rd place, Find the Digital Culprit | Seoul, South Korea |
| 2011 | Bronze Prize, Soonchunhyang University 'Y.I.S.F.' | Asan, South Korea |
| 2011 | Bronze Prize, Tongmyong University 'Information Science Olympiad' | Busan, South Korea |
| Software Vulnerability Reports | |||||||||||||||||||||
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| CTF Organizer and Challenge Author | |||||||||||||||||||
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