SBI Crypto, a mining pool under Japan's SBI Group, reportedly lost approximately $21 million in a suspected security breach. On-chain analyst ZachXBT identified suspicious outflows from SBI Crypto's addresses on September 24, involving Bitcoin, Ethereum, Litecoin, Dogecoin, and Bitcoin Cash. The stolen funds were moved through five instant exchange platforms and eventually funneled into the currency mixing service Tornado Cash. The attack shows similarities to previous hacks linked to North Korean entities. SBI Crypto has yet to comment on the incident.