sigma VS atomic-red-team

Sigma rules https://github.com/SigmaHQ/sigma its value, I get it. Here’s a post https://www.linkedin.com/posts/nasreddinebencherchali_detection-blueteam-sigma-activity-7104868070069817344-mn91?utm_source=share&utm_medium=member_desktop detailing that 31 Sigma rules from the Sigma repository are triggering on different stages of the attack as described here https://thedfirreport.com/2023/08/28/html-smuggling-leads-to-domain-wide-ransomware/

Idea: A free and open-source web repository of Sigma detections where users can find, contribute, and suggest edits to detections. All user contributions will go through a StackExchange-style moderation queue. Built-in conversion from Sigma to the query language of your choice.

If you want more ideas/inspiration, or even just a starting point for baseline rule logic check out https://github.com/SigmaHQ/sigma https://github.com/SigmaHQ/sigma and look into the different rules folders there.

Agreed in general. But with stuff like SIGMA, I'd lean towards stuff should going into git. Better version control, your docs can be markdown and live right next to your threat library, you can strap on CI/CD (so you can deploy/run stuff as part of a pipeline). Confluence is a great start, but it doesn't scale well.

Have a look a sigma rules: https://github.com/SigmaHQ/sigma

Sigma: https://github.com/SigmaHQ/sigma/pull/4151/files Yara: https://github.com/Neo23x0/signature-base/blob/master/yara/gen\_mal\_3cx\_compromise\_mar23.yar source: https://twitter.com/cyb3rops/status/1641130326830333984?s=20

I created a Defender Advanced Hunting query based of the Sigma rule https://github.com/SigmaHQ/sigma/blob/master/rules/windows/process_creation/proc_creation_win_rundll32_webdav_client_susp_execution.yml

You can write your own or look at testing tools like Cytest to ensure that your business goals are met and to ensure your sensors are configured correctly, and ART for attack chains.

I had heard that Falcon Overwatch has a detection for Exfiltration for C2, but I was not able to trigger it using my personal Kali Machine to host a C2 server with https://github.com/cedowens/SimpleC2_Server and then used Atomic Red Team: https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1041/T1041.md

Yup what the above said, you can use atomic red https://github.com/redcanaryco/atomic-red-team

Atomic red team have tests that should trigger it, it also has a clear description of what it does and how to clean up afterwards. https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/T1059.001/T1059.001.md suggest that you try obfuscation or cradle.

Dated but still full of goodness. https://github.com/redcanaryco/atomic-red-team/tree/e88a1ea463964839e267dba74ec1cf7bf634ccbf/ARTifacts/Initial_Access

Are you familiar with Atomic Red Team? Many quick & practical sample tests you can often run without much effort or prep work. All tests map to Techniques - a quick way to search through them all at the Tactic level is by searching within the CSV index of all their current tests here (I counted ~50 Collection-related tests just now): https://github.com/redcanaryco/atomic-red-team/blob/master/atomics/Indexes/Indexes-CSV/index.csv

Check out Atomic Red Team’s Redcanary.