A cyberattack against Optum, a UnitedHealth Group company, was linked to the BlackCat ransomware gang and resulted in an ongoing outage that impacted the Change Healthcare payment exchange platform.
Customers were notified by Change Healthcare earlier this week that due to a cybersecurity incident, some of its services are unavailable. The cyberattack was orchestrated by alleged “nation-state” hackers who gained access to Change Healthcare’s IT systems, according to a statement made by UnitedHealth Group in an SEC 8-K filing a day later.
Since then, Optum has been posting daily incident updates on a dedicated status page, alerting users to the fact that most services are temporarily unavailable due to Change Healthcare’s systems being offline to contain the breach and prevent future damage.
“We have a high level of confidence that Optum, UnitedHealthcare and UnitedHealth Group sys
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