https://www.bleepingcomputer.com/news/security/lockbit-ransomware-self-spreads-to-quickly-encrypt-225-systems/

A feature of the LockBit ransomware allows threat actors to breach a corporate network and deploy their ransomware to encrypt hundreds of devices in just a few hours.

Started in September 2019, LockBit is a relatively new Ransomware-as-a-Service (RaaS) where the developers are in charge of the payment site and development and 'affiliates' sign up to distribute the ransomware.