Apple quickly addressed a new threat that was is a dormant state & possibly awaiting special triggering to activate.  The revocation of CERT authority prevents the malware from interacting with malicious websites & further spreading.

Apple says it has already beaten new M1 Mac malware | TechRadar

Apple has moved to squash the threat of another new malware strain threatening its own-brand M1 Mac silicon devices.  The malware, dubbed “Silver Sparrow” by researchers at security firm Red Canary, was thought to have already infected around 30,000 Apple M1 Macs, as well as targeting some earlier Intel-powered Macs too. However Apple says it has now stepped in, telling TechRadar Pro it revoked certificates for developer accounts used by the malware’s creator to help deliver the malware packages onto victim devices – effectively stopping any new devices from being infected.