A few days ago I noticed that all public folders have a .exe/.pif/.txt/.src file with owner 501 with a size of 593920 bytes. Even deleted files after a while they reappear. The myCloud is not configured to access the Internet but only the intranet. is it a virus?
Yikes.
Sounds that way.
If you network is connected to the internet; a WD NAS running OS5 is on the internet (even if it does not have cloud services enabled). The only way to isolate these units is to either
- BLOCK internet access to the NAS FROM THE ROUTER (even without cloud services enabled; the NAS will “phone home” and will have open ports)
- Put the NAS on a network that has NO internet access. Yes; it makes the units harder to access - - → but much more secure.