Splunk Search

Windows Security Logs: Regex Filtering Search time

arrowsmith3
Path Finder

I have a windows security event that I am trying to extract a custom field for failed logon events. The problem I have is there are two duplicate categories and the text I am after is in the second category:

Ex:
Subject:
Security ID: S-1-0-0
Account Name: -
Account Domain: -
Logon ID: 0x0
Logon Type: 3
Account For Which Logon Failed:
Security ID: S-1-0-0
Account Name: PCVS Operator
Account Domain: PCVSB681-2

Normally I would just put in rex "Account Name:(?.+)" to extract the content of this field but since there is two of them, is there a way to skip the first field and go directly to the second?

Thanks!

Tags (3)
0 Karma
1 Solution

arrowsmith3
Path Finder

This resolved my question, thanks goes to ziegfried.

rex "(?ms)Account For Which Logon Failed.+?Account Name:\s+(?\V+)"

View solution in original post

0 Karma

arrowsmith3
Path Finder

This resolved my question, thanks goes to ziegfried.

rex "(?ms)Account For Which Logon Failed.+?Account Name:\s+(?\V+)"

0 Karma

arrowsmith3
Path Finder

Thank you but that didnt work, when I apply that to my search string it will list the entire content of the event.

Any other suggestions?

0 Karma

_d_
Splunk Employee
Splunk Employee

Try this:

| rex "(?ms)Account Name.*Account Name:(?<account>.+)"

Hope it helps.

> please upvote and accept answer if you find it useful - thanks!

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!

Kick the Tires Before You Commit: A Hands-On Tour of the Splunk Observability Cloud ...

Evaluating an enterprise observability platform usually goes like this: fill out a form, get a free trial with ...

Deep insights, no barriers: Splunk Observability Cloud Free Edition

As software delivery cycles continue to accelerate, observability shouldn’t be a luxury — it should be a ...

Monitoring AI Agents with Splunk Observability Cloud

Let’s say I’m running a travel planning AI app in production. A user asks for three concise hotel options in ...