CodeShell
CodeShell

About

Founded in 2013, CodeShell.kr is Korea's first cryptography wargame site.

Korea is home to a wide range of wargame sites: Pwnable.kr for binary exploitation, Webhacking.kr and chall.stypr.com for web security, Reversing.kr for reverse engineering, and Wargame.kr, Suninatas, and Hack-me for challenges across multiple disciplines. And, of course, Dreamhack.

From the first generation of wargames to Dreamhack, countless sites have shaped Korea's wargame community.

CodeShell.kr will continue its legacy as Korea's first cryptography-focused wargame site.

Owner

rayaseiren profile

rayaseiren

Cybersecurity Training Ecosystem Connector

  • WeChall · Administrator · September 2026 – Present
  • GemForgeLabs · Korea Chapter Lead · September 2026 – Present
  • CodeShell.kr · Rebuilder · December 2023 – Present
  • CodeShell.kr · Co-Founder · January 2013 – Present
  • Pwnable.kr · Sub-Administrator · January – December 2014
  • Hack-Me · Sub-Administrator · June 2012 – June 2013
  • WeChall · Global Rank #1 · June 20, 2026
  • GemForgeLabs · Ranked #1 · May 29, 2026
  • Hack n Roll CTF · 1st Place · September 2026

Administrator

tjdmin1 profile

tjdmin1

Vulnerability Researcher

  • TheSpot · Vulnerability Researcher · November 2025 – Present
  • LG U+ CTF · Special Award · November 2024
  • SMC-SECU CTF · 1st Place · 2023
  • Academic Credit Bank System · Information Security
BTB profile

BTB

Security Researcher

  • DEF CON 34 Finalist · Team Jinddabis · 2026
  • OpenAI Hall of Fame · 2026
  • NASA Hall of Fame · 2026
  • UniVsThreats CTF 1st Place · 2026
  • Yeungnam University College · Cyber Security Division
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knightchaser

Cyber Security Military Officer

  • Republic of Korea Air Force · Cyber Security Military Officer · April 2026 – Present
  • ENKI WhiteHat · Researcher · December 2023 – December 2025
  • Gachon University · Computer and Information Systems Security
  • Cisco APJC NetAcad NetRiders · Gold / Korea #1 · 2022

IGNITION CTF Contributor

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neko_hat

Vulnerability Researcher

  • RaonSecure · Core Research Team · July 2025 – Present
  • Four-chains · Team Lead, Blockchain Business Division 1 · January 2024 – July 2024
  • Chung-Ang University · SECURIOUS Vulnerability Analysis Track Senior · March 2024 – Present
  • Pwn2Own Automotive 2026 · Team ZIEN
  • DEF CON 34 Finalist · Team Jinddabis · 2026