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nashcoop
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Threat Prevention rule: IDS_AP_RULE_PREVENT_WSL_EXECUTION:IDS_BLADE_NAME_SPB

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I had a system running McAfee Agent 5.5.1.388, and ENS Threat Prevention 10.6.1.1208 detect and block the following: "3/13/2019 3:02:07 PM mfeesp(6840.11196) <SYSTEM> ApBl.AP.Activity: domain\username ran WSL.EXE, which attempted to access LXSSMANAGERPROXYSTUB.DLL, violating the rule "IDS_AP_RULE_PREVENT_WSL_EXECUTION:IDS_BLADE_NAME_SPB", and was blocked. For information about how to respond to this event, see KB85494."  The alert was logged in the AccessProtection_Activity.log locally on the system several times, but was never sent to EPO.  When I checked on the affected system in EPO I verified that we had been receiving alerts from the system as recently as last week.  When I looked in the McAfee defined Access Protection rules, I didn't find any rule listed named "IDS_AP_RULE_PREVENT_WSL_EXECUTION:IDS_BLADE_NAME_SPB".  After doing some Google searches I found a rule named Executing Windows Subsystem for Linux which sounded like it might be applicable.  I unchecked the block option, and that fixed the problem for the end user.  My question is two fold.  First, why didn't I receive the block alerts for this in EPO if they were in the log on the system a number of times across a number of days?  Second, why is the rule description referenced in the AccessProtection_Activity.log entirely different than the actual name of the rule in the policy?  I have gone ahead and upgraded the McAfee agent on the system to 5.6.0, but this seems more like a Threat Prevention or McAfee agent bug then anything else.

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wouterr
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Re: Threat Prevention rule: IDS_AP_RULE_PREVENT_WSL_EXECUTION:IDS_BLADE_NAME_SPB

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Hi,
this is a known issue:
https://kc.mcafee.com/corporate/index?page=content&id=KB82450

Issue: Triggering the Threat Prevention Access Protection rule "Executing Windows Subsystem for Linux" references IDS_AP_RULE_PREVENT_WSL_EXECUTEION:IDS_BLADE_NAME_SPB when describing the violated rule.

Workaround: IDS_AP_RULE_PREVENT_WSL_EXECUTEION:IDS_BLADE_NAME_SPB is a reference for the Access Protection rule "Executing Windows Subsystem for Linux" and will be translated in a future release.

Also support stated that this issue also results in the event not being reported in ePo

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wouterr
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Message 2 of 3

Re: Threat Prevention rule: IDS_AP_RULE_PREVENT_WSL_EXECUTION:IDS_BLADE_NAME_SPB

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Hi,
this is a known issue:
https://kc.mcafee.com/corporate/index?page=content&id=KB82450

Issue: Triggering the Threat Prevention Access Protection rule "Executing Windows Subsystem for Linux" references IDS_AP_RULE_PREVENT_WSL_EXECUTEION:IDS_BLADE_NAME_SPB when describing the violated rule.

Workaround: IDS_AP_RULE_PREVENT_WSL_EXECUTEION:IDS_BLADE_NAME_SPB is a reference for the Access Protection rule "Executing Windows Subsystem for Linux" and will be translated in a future release.

Also support stated that this issue also results in the event not being reported in ePo

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nashcoop
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Re: Threat Prevention rule: IDS_AP_RULE_PREVENT_WSL_EXECUTION:IDS_BLADE_NAME_SPB

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Thanks.  I'm surprised Google search results didn't find that.

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