Getting Data In

Conditional execution of transforms based on property of event

dstaulcu
Builder

Does anyone know of a way to control execution of transforms based on a non-metadata property of an event?

I have a collection of 100+ regular expressions which extract values using strongly typed field names within windows security logs. I don't want Splunk to have to execute 100+ regular expressions against every event. Ideally, I would like to control Splunk behavior such that only certain extraction rules are executed against events having certain patterns (in my case, EventCodes) within the sourcetype. Is there a way to do this?

Here is an example of the sort of logic I would like to be able to apply

Props.conf:
[source::WinEventLog:Security]
REPORT-wineventlog_security_subject_extractions_1 = if(match(EventCode,(4624|4624),"wineventlog_security_subject_extractions_1",noop)

Transforms.conf:
[wineventlog_security_subject_extractions_1]
SOURCE_KEY = _raw
REGEX = Subject :\s+Security ID:\s+(.)\s+Account Name:\s+(.)\s+Account Domain:\s+(.)\s+Logon ID:\s+(.)
FORMAT = Subject_SID::$1 Subject_Account_Name::$2 Subject_Account_Domain::$3 Subject_Logon_ID::$4

a_naoum
Path Finder

Did you found any solution on this?

0 Karma
Get Updates on the Splunk Community!

Enterprise Security Content Update (ESCU) v3.54.0

The Splunk Threat Research Team (STRT) recently released Enterprise Security Content Update (ESCU) v3.54.0 and ...

Using Machine Learning for Hunting Security Threats

WATCH NOW Seeing the exponential hike in global cyber threat spectrum, organizations are now striving more for ...

New Learning Videos on Topics Most Requested by You! Plus This Month’s New Splunk ...

Splunk Lantern is a customer success center that provides advice from Splunk experts on valuable data ...