Does ransomware on Bootcamp Windows affects macOS disk?

If Windows on bootcamp partition is infected by ransomware, and encrypts all files stored in disk, can it encrypt macOS disk files?

Solution 1:

Because windows can't write to a Mac formatted disk, it can't do anything bad to it. If the ransomware contained an HFS+ or APFS driver for windows, it could in theory also attack the host Mac drive. Of course that won't be a problem, because your Mac drive is all backed up safe and secure with Time Machine. But back to ransomware, does Windows ransomware typically attack/encrypt your external drives too, or just the main boot drive containing the current system?