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Geeking out on Splunk and IT Security
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Advent of code in SPL - 2025 day 3
Day 3 is here . Part 1 This one isn't too difficult. Given a series of digits such as 818181911112111, we need to pick two digits (conserving the order) to make the highest 2-digit number possible, so in this example 92. The first digit is obviously the most important, so we always want the highest one available, but we need to reserve at least one digit at the end of the bank for the second digit. So take the bank, remove the last digit, and find the highest digit: Now f

Gabriel Vasseur
1 day ago4 min read


Shrink your windows event logs license costs with ingest actions!
Windows events are a large part of the volume of logs ingested in a lot of splunk deployments. Wouldn't be cool if we could shrink them so they don't eat up so much precious precious license? In this post I'll walk through how I rebuilt Windows Event Logs (WELs) into a compact, Splunk-friendly format, cuting size by up to 60% without breaking field extractions. Key takeaways With a few targeted ingest actions and props/transforms tweaks, you can shrink Windows logs dramatical

Gabriel Vasseur
Oct 27, 202510 min read


ES8 findings, intermediate findings, etc confusion!
The key thing I did not appreciate when I wrote the previous version of this post is that the Risk data model is now fed from...

Gabriel Vasseur
Sep 5, 20256 min read


RBA: Aggregate user & system risks!
Since RBA is all about aggregating security events that are related to the same entity, Assets & Identities normalisation is crucial to...

Gabriel Vasseur
Jan 6, 202512 min read
Use Ingest Actions to shrink your ingest and make the most of your license!
On the 18th of September 2024 I gave a talk on this topic at the London Splunk User Group meetup. Ingest Actions are a simple feature of...

Gabriel Vasseur
Sep 20, 20241 min read


"And the nominees are..." - Wish me luck!
I have been nominated for a 2023 Splunkie Award and I am delighted to be a finalist for the Inventor Award! https://conf.splunk.com/the-s...

Gabriel Vasseur
Jul 3, 20231 min read
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