Charles Herring 14 December 2021
log4J

Log4J/LogShell (CVE-2021-44228) exploit IOC have been published by Cisco Talos (see: https://blog.talosintelligence.com/2021/12/apache-log4j-rce-vulnerability.html). These IOC have been packaged as a WitFoo Actor definition and have been pushed to all production instances of WitFoo Precinct and Precinct Cloud. The definitions were automatically applied at 1404 Eastern Standard time on December 14, 2021. Detections are both forward looking and retrospective across the entire Precinct big-data archive.

Actor functionality has been pushed early (ahead of 6.2 GA release) to allow data to be searched. A quick overview of the functionality can be viewed below.


Notification of matches can be found by filtering on “Actor” in the incident window and email notifications will also be sent (if configured/enabled.)

The Actor feature does allow defining custom IOC (as outlined in the video above.)

Questions about the publication can be posted on Community forums (https://community.witfoo.com/forums/topic/log4j-logshell-cve-2021-44228/) or by contacting WitFoo Support.

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Original URL
https://www.witfoo.com/security-breaches/log4j-logshell-ioc-search/

About the Author

Charles Herring

Charles Herring

Co-founder & Chairman, WitFoo

I started WitFoo in 2016 to make information and operations shareable across the craft of cybersecurity — between companies, law enforcement, national security and insurers, who mostly cannot see what each other sees. Before that I was at Lancope and Cisco, and I began in 2002 as Network Security Officer for the Naval Postgraduate School.

I lead research and development on a platform that ingests trillions of messages a day across hundreds of clusters. It is sold as Conductor, Reporter and Analytics, licensed flat per appliance with unlimited data — because a team charged by the gigabyte ends up making coverage decisions on a spreadsheet, months before the incident that needed the logs they dropped.

Everything here is mine, not the company's, and it wanders. Corrections are genuinely welcome — I would rather be right than consistent.

A note on how this was written: I use artificial intelligence tools to help me research, check facts, and edit these posts. The ideas, the arguments, and any mistakes are mine. I read the sources, I check the claims, and I take full responsibility for what I publish here. The views are my own and the writing is my intellectual property.