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Does full scan actually do heuristics scan as well?

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I run nightly scan with Malwarebytes 3.6.1 Premium. Takes about 25 minutes. But when I observe the scan progress, I notice it spends only a second or so on Heuristics. although this parameter is enabled in my settings.


Is it actually running Heuristics scan, or does it no longer do this?

Thanks in advance:


Windows 10

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Yes, the custom scan still performs the heuristics checks, however the way the scan engine has been optimized to improve performance it is most likely scanning the vast majority of heuristics locations/items during the normal file system object scan since you likely have it configured to scan the entire system drive where Windows is installed (usually C:\) meaning the only areas left for it to check by the time it reaches the end/heuristics phase of the scan are the registry locations which don't take long to scan at all.

In the past Malwarebytes would end up checking a lot of locations twice during scans because it lacked this optimization, so it would run through the normal scan of items on disk, then it would go back and perform the heuristics checks with many of those items it looks for being in locations that it already scanned once before during the normal file system portion of the scan which was redundant.  The Developers figured out a way to make scans more efficient by caching so that once a location has been checked once during the scan, the heuristics checks for that location don't need to be run a second time to check for the presence of unknown threats.

I hope that helps answer your question and if there is anything else we might assist you with please let us know.


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