Coincheck published a running incident notice after restricting NEM deposits and later suspending NEM trading and withdrawals. The exchange also paused withdrawals for all handled currencies including JPY, halted altcoin trading other than BTC, and stopped several fiat deposit methods while it investigated the issue. The excerpt does not provide confirmed cause, attacker attribution, malware, infrastructure, or IOCs, and states that details would be shared once known. The defensive value is limited to the incident timeline and the exchange's containment actions around NEM and broader withdrawal exposure.