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Reliable Contributor
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Message 21 of 22

Re: Detection of hivenightmare aka serioussam

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Hi everyone, 

We have this rule in report only mode with very few events.  I am wondering if anyone has flipped the switch and started blocking?

If you have can you share what you have seen?  Has there been any impact to blocking with this rule?

McAfee coverage for July 2021 CVE-2021-36934 "HiveNightmare/SeriousSAM" vulnerability



McAfee Employee
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Message 22 of 22

Re: Detection of hivenightmare aka serioussam

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Hello @youngs ,

The user-defined rule has a low risk of false positives since it targets specific folders in the system, but we do recommend verifying the events you have with report mode to see what would be blocked and testing the rule in a few systems before deploying to your entire environment in order to avoid any outages due to false positives.

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Thanks and regards,
Tiago A
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