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Palo Alto TA user field extraction issue


Having an issue with trying to drop a prefix before the username field in the Palo Alto app. The username has the prefix of 'foo\' before the user name. I checked the props.conf file in the app to see the following stanza:

# Set user field
EVAL-user                            = coalesce(src_user,dest_user,"unknown")

I created a regex that I tested on regex101 which worked perfectly


However, testing that regex in Splunk I get, "The regex '_raw=,foo(?[^,]+),' is invalid. Regex: unmatched closing parenthesis.
Any suggestions on how to get rid of the prefix and just keep the user name?

0 Karma


Finally figured this out. Used the following which worked:

EXTRACT-foo_user = ,foo(?:\\\\|\\)(?<user>[^,]+),
0 Karma

Ultra Champion


EVAL-user = trim(coalesce(src_user,dest_user,"unknown"),"foo\\")
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