Splunk Search

Regex extraction

timbCFCA
Path Finder

I am attempting to extract key value pairs from a data stream with the following syntax.

Successful Logon:     User Name: user     Domain: domain     Logon ID: (0x0,0x1480338F)     Logon Process: etc     Workstation Name:      Logon GUID: {d660922a-0228-f3f5-0acd-2052d7e03d22}     Caller User Name: -     Caller Domain: -     Caller Logon ID: -     Caller Process ID: -     Transited Services: -     Source Network Address: ...     

My transforms.conf contains

[with_colon] 
REGEX = \s\s\s(.*?):\s(.*?)\s\s 
FORMAT = $1::$2 
CLEAN_KEYS = 1 
MV_ADD = 1
REPEAT_MATCH = true

and my props.conf contains

[my_type]
# Derived from windows_snare_syslog
MAX_TIMESTAMP_LOOKAHEAD = 32
TRANSFORMS = syslog-host
REPORT-syslog = syslog-extractions
REPORT-colon = snare_colon
SHOULD_LINEMERGE = False
TIME_FORMAT = %b %d %H:%M:%S

The regular expression works perfectly in my test environment (Notepad++ with the latest regex engine) but not a single new field is extracted. What am I doing wrong?

0 Karma
1 Solution

Ayn
Legend

Looks like a typo in your props.conf? The section in transforms.conf is called with_colon but the transform you're referring to in props.conf is snare_colon.

View solution in original post

0 Karma

Ayn
Legend

Looks like a typo in your props.conf? The section in transforms.conf is called with_colon but the transform you're referring to in props.conf is snare_colon.

0 Karma

timbCFCA
Path Finder

Ayn.. Thanks so much. That was exactly the problem. Over the course of the implementation I changed the name slightly and hadn't updated it here. I now have a few hundred more fields I don't have to enter by hand.

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!

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 ...