A novel ransomware attack forced insurance giant CNA to take systems offline and temporarily shutter its website. The attack occurred earlier this week and leveraged a new variant of the Phoenix CryptoLocker malware.
The Chicago-based company—the seventh largest commercial insurance provider in the world—said it “sustained a sophisticated cybersecurity attack” on Sunday, March 21, according to a statement on the home page of its website. The statement is the only functionality the company’s site currently maintains.
“The attack caused a network disruption and impacted certain CNA systems, including corporate email,” according to the statement.