Kapersky Cloud Security Reports "HEUR:AdWare.Script.Generic"

[fohrums]

SPECIFICATIONS:

Palemoon-Portable-28.4.1.win64
win7-v6.1.7601sp1-x64

Using Kapersky Cloud and a scan of my PC reported me the results of

Event "Legitimate software that can be used to harm your computer or personal data was detected." has occurred on device FOOBAR in Windows domain FOOBAR on Day, Month d, 2019 hh:mm:ss PM (GMT+hh:mm)
Result: Detected: not-a-virus:HEUR:AdWare.Script.Generic
User: Foobar
Object: C:\Foobar\User\Palemoon\Profiles\Default\cache2\entries\<hashgoeshere>
Reason: Expert analysis
Database release date: m/d/yyyy m:mm:hh AM/PM
Hash: <hashgoeshere>

The concern is Result: Detected: not-a-virus:HEUR:AdWare.Script.Generic

Anybody else experience this or do I need to clear the browser more often? I have Firefox installed, but only Palemoon raised from Kaspersky Cloud Security.

[Moonchild]

What you should do is exclude the browser's cache folder from your scanning

[fohrums]

So, you're saying Kapersky is flatout false reports? I'm interested that it even found something within Palemoon to begin with, because it didn't find anything for Firefox v66.02. I would also like to know if this could potentially be something bad and posting in bugs should be the right place to ask this?

[Isengrim]

Most antivirus software are suspicious of any internet-connected program that isn't whitelisted. Chrome and Firefox are often whitelisted by many AV programs.

[yami_]

So, you're saying Kapersky is flatout false reports?

I am not Moonchild, but your AV software detected a JS script that a website that you visited was using to serve ads. Web browsers tend to cache resources downloaded from the Internet to speed up subsequent page loads.

[fohrums]

Thank You @Isengrim & @yami_ that cleared things up. For a moment I thought I had Greedy Cache Extension installed but it wasn't. I think I just had PM running too long.

[Moonchild]

Thank You @Isengrim & @yami_ that cleared things up. For a moment I thought I had Greedy Cache Extension installed but it wasn't. I think I just had PM running too long.

Not really. The main issue with scanning your web cache folder is that you'll be constantly scanning cached web content, i.e. content of pages you're visiting. This can easily trigger false positives because those files are never run in a way that malware would; the example in this thread being a benign ad serving script on a web page that's fine in that context, but apparently is also used in stand-alone adware (which you potentially wouldn't want on your system). It's just a waste of computer resources to scan those folders and can cause confusion like in this thread