The article reports that hacking incidents against South Korean cryptocurrency exchanges continued to occur and that losses from unauthorized withdrawals were increasing. It says police investigations remained unresolved while authorities cited international cooperation, reflecting the difficulty of tracing thefts enabled by blockchain decentralization and anonymity. The DPRK-relevant section is a policy warning: given past incidents involving Bitcoin extortion, the article argues that South Korea should prepare for cryptocurrency hacking from North Korea by bringing blockchain expertise into government response. The excerpt provides no technical infection chain, malware, infrastructure, or specific exchange indicators.