New, from me:

Authorities in Australia, the United Kingdom and the United States this week levied financial sanctions against a Russian man accused of stealing data on nearly 10 million customers of the Australian health insurance giant Medibank. 33-year-old Aleksandr Ermakov allegedly stole and leaked the Medibank data while working with one of Russia's most destructive ransomware groups, but little more is shared about the accused. Here's a closer look at the activities of Mr. Ermakov's alleged hacker handles.

https://krebsonsecurity.com/2024/01/who-is-alleged-medibank-hacker-aleksandr-ermakov/

tl;dr: Ermakov appears to have been a top member of the rapacious REvil ransomware group. He also runs an IT consulting business w/ a guy I identified in Dec. 2023 as Rescator, the hacker handle that sold tens of millions of payment cards stolen from Target and Home Depot in 2013 and 2014.