Verkkounitedhealth says files with personal information that could cover a β€œsubstantial portion of people in america” may have been taken in the cyberattack.

Verkkounitedhealth has blamed its hack on a notorious criminal group called alphv, or blackcat, that the justice department says has been.

Verkkoa cyberattack earlier this year against a unitedhealth group subsidiary has proved costly for one of the nation's largest employers.

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Verkkothe wall street journal reported monday that the criminal hacking affiliate of alphv broke into change healthcare’s network using stolen credentials.

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