"Black Basta" is a new ransomware strain discovered during April 2022 - looks in dev since at least early February 2022 - and due to their ability to quickly amass new victims and the style of their negotiations, this is likely not a new operation but rather a rebrand of a previous top-tier ransomware gang that brought along their affiliates.
Uses ChaCha20 encryption
Deletes shadow copies via vssadmin
Terminates processes and services
Uses PowerShell for execution and deployment
Lateral movement via PsExec and SMB