Splunk Enterprise Security

Can some one help me in explaining below Splunk ES Rule


Rule Name : Abnormally High Number of Endpoint Changes By User

Description: Detects an abnormally high number of endpoint changes by user account, as they relate to restarts, audits, filesystem, user, and registry modifications.

| tstats count from datamodel=Endpoint.Filesystem where Filesystem.tag="change" by Filesystem.user | eval change_type="filesystem",user='Filesystem.user' | tstats append=T count from datamodel=Endpoint.Registry where Registry.tag="change" by Registry.user | eval change_type=if(isnull(change_type),"registry",change_type),user=if(isnull(user),'Registry.user',user) | tstats append=T count from datamodel=Change.All_Changes where nodename="All_Changes.Endpoint_Changes" by All_Changes.change_type,All_Changes.user | eval change_type=if(isnull(change_type),'All_Changes.change_type',change_type),user=if(isnull(user),'All_Changes.user',user) | stats count as change_count by change_type,user | xswhere change_count from change_count_by_user_by_change_type_1d in change_analysis by change_type is above medium

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Ultra Champion

The search looks in the change datamodel for changes that have happened on endpoints.
It looks for hosts which have had a higher number of changes per day that exceeds the medium average for that host and user.

Commonly if a host is compromised, an attacker will make multiple changes to try to exploit it for lateral movement or privilage escalation.

This search looks for hosts that may have been affected.

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What part of that do you need explained?

If this reply helps you, an upvote would be appreciated.
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