UnitedHealth says hackers possibly stole large number of Americans' data

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UnitedHealth Group announced that hackers stole health and personal data of potentially a "substantial proportion" of Americans from its systems in February. The intrusion at its Change Healthcare unit, which processes about 50% of U.S. medical claims, caused widespread disruption in payment to doctors and health facilities. The stolen data includes files with protected health information or personally identifiable information, which could cover a substantial proportion of people in America. The theft occurred despite a ransom payment. The cybercriminal gang behind the breach, known as AlphV or BlackCat, has not responded to multiple requests for comment. Another hacker group, Ransomhub, claimed to have received the data from a disgruntled affiliate of BlackCat.

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