Coinrail reported a June 2018 cryptocurrency exchange hack involving unauthorized withdrawals of several assets, including Pundi X, Aston, and NPER, with linked reporting estimating losses at about 40 billion KRW. The exchange moved roughly 70% of remaining holdings to cold wallets, coordinated with token issuers, IDEX, law enforcement, KISA, and police to freeze or recover assets, discarded the compromised system, and rebuilt service with stronger administrative controls and network separation.