I don't see anything in your list that has been identified as a Virus/Malware, although many would consider CleanMyMac to be Malware but that would have been downloaded on the old Mac and transferred to your computer. It is a utility still available today, but around here it is known as BrickMyMac due to the amount of trouble it has caused users and the amount of time spent on this Support Site helping people remove it. The files in your list are quite old and you just need to delete them after they were transferred to your new Mac.
Mac OS already performs scans of files like you indicated in your post, including when there is a file change. Beyond the regularly scheduled scans, there are 3 conditions when a scan is performed instantly.
- An app is first launched
- An app has been changed (in the file system)
- XProtect signatures are updated
Protecting against malware in macOS - Apple Support
And then here is more details on when the regularly scheduled scans are performed.
- Fast Scan every 6 hours
- Standard Scan every 24 hours
- Slow Scan every 7 days
https://eclecticlight.co/2025/02/05/watch-your-background-scheduling-xprotect-remediator-scans/
New virus definitions used in those checks are updated automatically. The most recent one is version 5437 that downloaded on 6/2/26. You can check if you have that one by holding the Option key and clicking the Apple button in the upper left and choosing System Information. Select Installations in the Sidebar and scroll all the way down to the last XProtectPlistConfigData install you see.
