https://www.bleepingcomputer.com/news/security/the-week-in-ransomware-september-10th-2021-revil-returns/

This week marked the return of the notorious REvil ransomware group, who disappeared in July after conducting a massive attack using a Kaseya zero-day vulnerability.

Their July attack affected over 1,500 businesses and drew the full attention of international law enforcement and the White House, who demanded that Russia do something about these attacks.