Splunk Search

Extract data from one field ot another using Regex

PTC_
Explorer

Hello,
(I will use fictional data to give examples)

I'm trying to use regex to extract data from one field to another, but Splunk doesn't find the data I want in this specific field.

The field I want to extract data (let's call it DATA_FIELD) looks something like:
SMBv2 guid=111111-b111-1111-1111-11111aaaa11 time=2023-02-27 15:17:35 domain=DOMAINNAME version=12.1.11111 ntlm-ver=15 domain=DOMAINNAME name=HOSTNAME domain-dns=DOMAINDNS name-dns=NAMEDNS

I want to extract "name=HOSTNAME" from this field to another one (HOSTNAME_FIELD)
I suspect my Regex parameters are not working with Splunk, even though I tested them all in regex101 .
Example:
| rex field=DATA_FIELD "HOSTNAME_FIELD: name=(?<name>\S*(?))\s"

I tried many forms of regex, such as:
name.(?<=[=])\S*(?:\s)?
.name=(?<=[=])\S*(?)
name=(?<name>\S*(?))\s

None of them worked in Splunk but they work in regex101.

Is this problem on the regex formula itself on Splunk? Or is it problem with the sintax?
What's the best way to extract this data?

Labels (4)
0 Karma

ITWhisperer
SplunkTrust
SplunkTrust
| rex field=DATA_FIELD "name=(?<HOSTNAME_FIELD>\S*?)\s"
0 Karma
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!

Index This | What travels the world but is also stuck in place?

April 2026 Edition  Hayyy Splunk Education Enthusiasts and the Eternally Curious!   We’re back with this ...

Discover New Use Cases: Unlock Greater Value from Your Existing Splunk Data

Realizing the full potential of your Splunk investment requires more than just understanding current usage; it ...

Continue Your Journey: Join Session 2 of the Data Management and Federation Bootcamp ...

As data volumes continue to grow and environments become more distributed, managing and optimizing data ...