Can ransomware encrypt files within Cryptomator vaults?

[Michael]

@infeo

How about you try WinFSP?

Or Personal Backup that works like a charm with WebDAV, Dokany and WinFSP .

@k.fritz

Do ramsomware trojans recognize the Cryptomator drives and encrypt their contents?

Depends on the “quality” of the ransomware, but I would assume a clear “yes”.

@k.fritz

This would mean that a backup vault must not be unlocked and mounted at all times

You are right (from my paranoid point of view). I would not recommend that in a backup strategy

@k.fritz

which would counteract my idea of fully automated backups into a vault.

I do this with the software mentioned above. This includes opening the vaults right before performing the backup (and close them afterwards of course). But you cannot do on-the-fly backups. At least not in a practical way.