Premera Blue Cross, a major provider of health care services, disclosed today that an intrusion into its network may have resulted in the breach of financial and medical records of 11 million customers.
The health care provider said it is working with security firm Mandiant and the FBI in the investigation. Mandiant specializes in tracking and blocking attacks from state-sponsored hacking groups, particularly those based in China.
There are indications that this may be the work of the Chinese espionage group tied to the breach disclosed earlier this year at Anthem, an intrusion that affected some 78 million Americans.
According to Brian Krebs' blog, it's possible that both Premera Blue Cross and Anthem attacks could be performed by the same state-sponsored group of hackers.