Splunk Search

Watchlist Lookup

opsec
New Member

Hello, we need help setting up an ongoing query against a watchlist of suspicious IP addresses. We have made the following config changes so far with no results:

  1. created a .CSV file in $SPLUNKroot\etc\apps\search\lookups (see sample contents below)

    bad_ip,suspicious
    X.X2.12.12,1
    X.X3.12.13,1
    X.X4.191.4,1
    X.X5.191.14,1

  2. create the following props.conf; and transform.conf in \search\local\

props.conf

[cisco_asa]
LOOKUP-watch = sampl_watchlist bad_ip AS src

transforms.conf

[sampl_watchlist]
filename = sampl_watchlist.csv

Basically, how can we run our firewall logs against the watch list and alert on all matches. Thanks.

Tags (2)
0 Karma

lguinn2
Legend

This should do it:

sourcetype=cisco_asa suspicious=1

because you defined an automatic lookup in props.conf

BTW, I would add the following to transforms.conf

min_matches = 1
default_match = "no match"

which will let you do other interesting searches, too.

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!

Make Your Machine Data AI-Ready in Splunk

Every team is getting ready for AI agents.    Watch On-Demand   In this Tech Talk, Splunk platform specialists ...

How to Break a Kubernetes Pod on Purpose and Let the AI Troubleshooting Agent Find ...

Let's say I've just rolled out a Kubernetes Deployment with a typo in the image tag. Nothing explodes. The pod ...

Splunk Add-on for Microsoft Windows 11.0.3: Parse Once, Search Faster

The updated Splunk Add-on for Microsoft Windows helps customers search Windows events faster by reducing ...