From a breach notification by civil law firm Santoro Whitmire in Las Vegas:
Recently, after the firm permanently closed its business, we were the target of a ransomware attack. Ransomware is a computer virus that encrypts computer systems until and unless we pay money (i.e., the ransom) demanded by the attackers. We immediately notified law enforcement, moved quickly to contain the incident, and conducted a thorough investigation with the assistance of computer forensic experts. We believe it is likely the attacker only wanted money and not the information on our computers but, in an abundance of caution, we are letting you know that your information may have been accessed by the attackers.
Read more of their notification, a copy of which was submitted to the California Attorney General.