McLaren Health Care Investigating Cyberattack and Possible Data Breach Affecting Millions

McLaren Health Care suffered a ransomware cyberattack in August/September that disrupted its computer network and may have leaked patient data.

The ransomware group BlackCat/AlphV has claimed responsibility and says it stole 6TB of McLaren data including 2.5 million patient records.

McLaren is investigating the claims and has notified law enforcement. They have strengthened cybersecurity measures.

McLaren says some claims by BlackCat/AlphV are unconfirmed, like backdoor access still existing.

McLaren has not disclosed specifics like when attack started, how many affected, or what data was compromised. Federal law requires reporting breaches.