OKX has suspended its DeFi service after EU regulators scrutinized its DEX aggregator, allegedly used by North Korean hackers to launder $100 million from Bybit. The exchange cited security upgrades and regulatory compliance as reasons for the suspension. OKX introduced a hacker address detection system to block illicit transactions in real-time. EU authorities are now assessing OKX’s Web3 services under MiCA regulations. The exchange denies wrongdoing, emphasizing it operates as a DEX aggregator without custody of user funds. OKX remains committed to compliance and industry security amid growing regulatory oversight of decentralized finance platforms.