Microsoft says that Storm-1175, a China-based financially motivated cybercriminal group known for deploying Medusa ransomware payloads, has been deploying n-day and zero-day exploits in high-velocity attacks.

https://www.bleepingcomputer.com/news/security/microsoft-links-medusa-ransomware-affiliate-to-zero-day-attacks/

Microsoft links Medusa ransomware affiliate to zero-day attacks

Microsoft says that Storm-1175, a China-based financially motivated cybercriminal group known for deploying Medusa ransomware payloads, has been deploying n-day and zero-day exploits in high-velocity attacks.

BleepingComputer
@BleepingComputer Sounds like Microsoft has finally gotten around to looking up what zero-day means... 🤪