Getting Data In

Transforms/props event filtering

danilom
Explorer

Hello,
I would like to sent to nullQueue some windows security events based on some regex. So I have defined:

props.conf

[WinEventLog:Security]
TRANSFORMS-set= setnull,pruneprocesses,pruneusers,prunemachines,setparsing

transforms.conf

[setnull]
REGEX = .
DEST_KEY = queue
FORMAT = nullQueue

[pruneprocesses]
REGEX = Process\s+Name:\s*.*?(svchost.exe|lsass.exe) 
DEST_KEY= queue
FORMAT = nullQueue

[pruneusers]
REGEX = Account\s+Name:\s*.*?(-|SYSTEM) 
DEST_KEY= queue
FORMAT = nullQueue

[prunemachines]
REGEX = Account\s+Name:\s+[A-Z0-9-]+[\$]
DEST_KEY= queue
FORMAT = nullQueue

[setparsing]
REGEX = (?msi)^EventCode=(4624|4625|4634|4656|4659|4660)\D
DEST_KEY = queue
FORMAT = indexQueue

But, obviously, the events that matches one of the pruneusers, pruneusers or prunemachines AND matches the setparsing are indexed, while I would like that if an event matches one of the "prune" rules the event itself must NOT be indexed ... how can I do that?

Thank in advance

0 Karma
1 Solution

lukejadamec
Super Champion

Have you tried putting setparsing after setnull and before prune...?

View solution in original post

danilom
Explorer

Correct! ... now I have understood how props/transforms work.

Thank!

0 Karma

lukejadamec
Super Champion

Have you tried putting setparsing after setnull and before prune...?

Got questions? Get answers!

Join the Splunk Community Slack to learn, troubleshoot, and make connections with fellow Splunk practitioners in real time!

Meet up IRL or virtually!

Join Splunk User Groups to connect and learn in-person by region or remotely by topic or industry.

Get Updates on the Splunk Community!

Data Management Digest – August 2026

MichelleCorpora_1-1788182384472.png Welcome to the August 2026 edition of Data Management Digest! August was a ...

Your Feedback. Our Roadmap. Visit the PX Feedback Booth at .conf26

You use Splunk every day, come and help shape what's next.  Save Your Seat: Product-Focused Sessions at ...

Agentic SOC Triage: Investigating Splunk ES Notables with MCP Server and a Local LLM

The Problem: Too Many Alerts, Too Little Context Security operations teams running Splunk Enterprise Security ...