Active Insights Possible Ransomware

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Active Insights Possible Ransomware

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Operating system
  1. macOS
Received a notice from Active Insights about possible ransomware on my NAS. Looks like it came from my Mac Studio's Time Machine backup. The files (about 5 of them) are labeled "smbdelete" with additional alphanumeric characters after.

This alerted me about an hour after my Syno upgraded to the latest DSM.

Google seems to suggest these files are harmless and only temporary on Macs. I'm wondering if this is due to the SMB share being unmounted unexpectedly during the DSM update.

Thoughts?
 
I have seen these SMB delete file remnants before: they a 'dotted' hidden files. They are where I have backups happening and I thought it may be between Mac and SMB mounted locations when I was using Carbon Copy Cloner (my go-to for general one-way sync). So I think it's a leftover from some activity that might have overlapped another (?) resulting in this not being cleaned up.

To view hidden files in Mac's Finder you can toggle on/off using key-combo 'shift cmd .'.

Got to say I decided to uninstall Active Insight on all my NAS. Instead I run CMS, which is private, and that sends notifications centrally.
 

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