Splunk Search

Blacklist WinEventLog::/Security with user names ending in $

ericrenfro
New Member

I'm trying to get a blacklisted log entry that works on Universal Forwarders to filter out specific event codes with user fields that end in $ in their value.

What I have now, works on my test environment with uploaded sample logs, but not directly on the Universal Forwarder itself:

blacklist1 = EventCode="(4624|4634)" user=".*\$"
blacklist2 = EventCode="4672" Account_Name=".*\$"

What can I do to get this right so it actually works? I know that in the event log, raw, the matching line actually is space indented and something like:

...
Subject:
  Security ID:    S-1-5-18
  Account Name:   something$
  Account Domain:   domain
...

Thank you!

0 Karma

spayneort
Contributor

Try these:

blacklist1 = EventCode="4624" Message="(?ms)New\sLogon:.*?Account\sName:[^\n]+\$$"
blacklist2 = EventCode="(4634|4672)" Message="(?m)Account\sName:[^\n]+\$$"
Get Updates on the Splunk Community!

Accelerating Observability as Code with the Splunk AI Assistant

We’ve seen in previous posts what Observability as Code (OaC) is and how it’s now essential for managing ...

Integrating Splunk Search API and Quarto to Create Reproducible Investigation ...

 Splunk is More Than Just the Web Console For Digital Forensics and Incident Response (DFIR) practitioners, ...

Congratulations to the 2025-2026 SplunkTrust!

Hello, Splunk Community! We are beyond thrilled to announce our newest group of SplunkTrust members!  The ...