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Kudos0

A problem about 'Heuristic Setting'

System Version: Win10 x64
Norton Version: NS22.5

DETAILS: There are two different virus samples, and the two samples were detected by Norton as "Suspicious.Cloud.5" and "Trojan.Gen.2", respectively. (Under default setting"AUTO")

                 However, after I adjust heuristic detection setting to 'HIGH' ,which means norton can be more aggressively scan designated files, and restart to scan the both samples, strange thing happened, Norton detection result changed, telling me the two samples are safe. Therefore, I adjust heuristic setting to "AUTO" again, and scan them, norton successfully detected the two virus.

                So, my question comes: according to norton's description about heuristic setting, shouldn't the latter heuristic setting 'high' detect more threat? but actually norton didn't do that.

Replies

Kudos1 Stats

Re: A problem about 'Heuristic Setting'

I've asked for someone to look into this issue.

Thanks for posting!

A little bit of knowledge is... well a little bit of knowledge.
Kudos0

Re: A problem about 'Heuristic Setting'

I have asked for your .ZIP file to be removed.

Please do not post malware in these forums.

A little bit of knowledge is... well a little bit of knowledge.
Kudos0

Re: A problem about 'Heuristic Setting'

I am sorry for that. I have removed them.
Kudos0

Re: A problem about 'Heuristic Setting'

Symantec’s antivirus products contain a highly sensitive detection technology designed to detect entirely new malware threats without traditional signatures. This technology is aimed at detecting malicious software that has been intentionally mutated or morphed by attackers. You can submit files detected as suspicious to Symantec Security Response for further categorization. For instructions on how to do this, read Submit Virus Samples.

Suspected false-positive detections can be reported to Symantec using our false-positive detection reporting page to contribute to the effectiveness of our product.

Kudos1 Stats

Re: A problem about 'Heuristic Setting'

@mrwangwaff,

Thanks for reporting this issue. I have sent you a private message requesting for more info. Please check it when you get a chance.

Thanks,
Sunil G A
Norton Forums Administrator
Symantec Corporation

Sunil_GA | Norton Forums Administrator | Symantec Corporation
Kudos0

Re: A problem about 'Heuristic Setting'

Sunil_GA:

@mrwangwaff,

Thanks for reporting this issue. I have sent you a private message requesting for more info. Please check it when you get a chance.

Thanks,
Sunil G A
Norton Forums Administrator
Symantec Corporation

Thanks Sunil.  

A little bit of knowledge is... well a little bit of knowledge.
Accepted Solution
Kudos6 Stats

Re: A problem about 'Heuristic Setting'

Hello @mrwangwaff,

The issue should be now be fixed, please download the latest virus definitions and check for the issue.

Just to share high level details regarding the root cause of this behavior, we had the "Aggressive" mode temporarily turned off for this detection (Suspicious.Cloud.5) as part of investigation, due to which the files may be undetected.

The detection has been re-enabled with the latest definitions, the product should detect the malicious files matching the detection in both Auto and Aggressive mode successfully.

Thanks,
Prasad B

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