Cyberattack exposes 10 million records at US health insurer Excellus

Hackers have penetrated the IT systems of U.S. health insurer Excellus BlueCross BlueShield and gained access to personal, financial and medical information of more than 10 million people, the company disclosed Thursday.

The initial attack occurred in December 2013, but the company did not learn about it until Aug. 5. Since then it has been working with the FBI and cybersecurity firm Mandiant to investigate the breach.

The hackers may have had access to customer records which include names, addresses, telephone numbers, dates of birth, Social Security numbers, member identification numbers, financial accounts and medical claims information.

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