topic Re: Trying to create a custom Field Extraction in Splunk Search

Trying to create a custom Field Extraction

scout29 — Wed, 08 Nov 2023 20:55:41 GMT

I am trying to write a regex to extract a field called "registrar" from some data like i have below. Can you please help how i could write this regex to be used in a rex command to extract the field? Below are three example events:

Registry Date: 2025-10-08T15:18:58Z Registrar: ABC Holdings, Inc. Registrar ID: 291 Server Name: AD12

Registry Date: 2025-11-08T15:11:58Z Registrar: OneTeam, Inc. Registrar ID: 235 Server Name: AD17

Registry Date: 2025-12-08T15:10:58Z Registrar: appit.com, LLC Registrar ID: 257 Server Name: AD14

I need the regex to use to extract the field called "registrar" which in the above example would have the following three value matches:

ABC Holdings, Inc.

OneTeam, Inc

appit.com, LLC

Re: Trying to create a custom Field Extraction

m_pham — Wed, 08 Nov 2023 21:43:17 GMT

Try adding this to your search

| rex field=_raw "Registrar ID: (?<registrar_id>\S+)"

Update: I misread your post, standby for an updated search to include all three field extraction - unless someone else beat me to it. You can also use the "Extract New Fields" or "Event Actions" option when you run your search.

Re: Trying to create a custom Field Extraction

scout29 — Wed, 08 Nov 2023 21:41:51 GMT

i am looking for the field registrar to be extracted. There are three spaces after the registrar string - but i cant seem to write my regex to capture the full registrar name up to the three spaces. I am using this but not getting the full string extracted

\sRegistrar:\s(?<registrar>\w+\s\w+)

Re: Trying to create a custom Field Extraction

m_pham — Wed, 08 Nov 2023 21:55:19 GMT

Try this - I'm not the best at regex and someone else may come along and provide a more efficient one.

Registrar: (?<registrar>.+[^\s]).+Registrar ID

Re: Trying to create a custom Field Extraction

richgalloway — Thu, 09 Nov 2023 01:19:50 GMT

Assuming the fields are always in the same order, this should do it.

| rex "Registrar: (?<registrar>.*?) Registar ID"