The agency said the malware has already compromised more than 150 organizations and provided insight into its ransomware-as-a-service behavior.

The FBI has alerted companies in the private sector to a spate of attacks using the Egregor ransomware. The malware currently is raging a warpath across businesses worldwide and has already compromised more than 150 organizations.

The agency issued an advisory (PDF) that also shed new light and identifies the innerworkings of the prolific malware, which has already been seen wreaking indiscriminate havoc against various types of organizations. Bookseller Barnes & Noble, retailer Kmart, gaming software provider Ubisoft and the Vancouver metro system Translink all are known victims of the ransomware.