CareFirst BlueCross BlueShield first learned in May 2014 of malware on an information system, according to two health information security consultants. But the healthcare insurer apparently did not realize the malware was not completely eradicated -- and the system was hacked in June 2014.
This spring, as other health insurers including Anthem and Premera were announcing huge cyber attacks, CareFirst contracted with security firm Mandiant (owned by FireEye) to conduct an end-to-end examination of its IT environment and the breach was found, CareFirst acknowledged on May 20.
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