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How the ransomware attack at Change Healthcare went down: A timeline
The hack at Change Healthcare stands as the biggest breach of U.S. medical data in history, exposing 190 million people's data.
The status page on Change Healthcare’s website was flooded with outage notifications affecting every part of its business, and later that day the company confirmed it was “experiencing a network interruption related to a cyber security issue.” Clearly something had gone very wrong. A dark web leak site associated with the ALPHV/BlackCat gang also took credit for the attack, claiming to have stolen millions of Americans’ sensitive health and patient information, giving the first indication of how many individuals this incident had affected. New details about the hack emerged in the state’s complaint, including that the ALPHV hackers initially broke in using the stolen username and password of a “low-level customer support employee,” which wasn’t protected with multi-factor authentication.
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