https://www.bleepingcomputer.com/news/security/epic-fail-emotet-malware-uses-fake-windows-10-mobile-attachments/

The Emotet malware is now using malicious email attachment that pretends to be made by Windows 10 Mobile, an operating system that reached the end of life in January 2020.

The Emotet botnet spreads through spam emails that contain malicious Word documents. These Word documents contain malicious macros that will download and install Emotet on a victim's computer when enabled.