Ransomware group Blackcat is behind cyberattack on UnitedHealth division, company says

Traders work at the post where UnitedHealth Group is traded on the floor of the New York Stock Exchange.Change Healthcare on Thursday confirmed that ransomware group Blackcat is behind the ongoing cybersecurity attack that's caused widespread disruptions to pharmacies and health systems across the U.S."Our experts are working to address the matter and we are working closely with law enforcement and leading third-party consultants," Change Healthcare told CNBC in a statement Thursday. "We are actively workin ...