sysmon-modular VS atomic-red-team

I was specifically using the https://github.com/olafhartong/sysmon-modular config, but once we started seeing systems crash I tried building extremely minimal configs and still found them causing hangs.

I use this one: https://github.com/olafhartong/sysmon-modular

2) There are many opensource solutions, and you hit on all the important ones. Think creativitly, and test all your controls. hit your boxes with Metaspoilt and atomic redteam. These tools will help you verify that you have the proper controls in place, and that you are able to detect attacks (successful, and failed). Run auditd with Florian Roth's rule set on your linux boxes (https://github.com/Neo23x0/auditd/blob/master/audit.rules ), and sysmon (https://github.com/olafhartong/sysmon-modular) on windows.

Agree. Harden your endpoints (if unsure where to start consider hardening kitty, https://github.com/scipag/HardeningKitty) and harden Defender (https://0ut3r.space/2022/03/06/windows-defender/). Add Sysmon with a good config (https://github.com/olafhartong/sysmon-modular) and you've reached a good starting point.

Another really excellent resource (also called out by Swift) is Olaf Hartong’s Sysmon-Modular project: https://github.com/olafhartong/sysmon-modular As well as having a few full configs, Olaf’s project has modular XML configurations for each supported Sysmon Event ID. This can be incredibly helpful for fine tuning your configs.

Yes absolutely. This is a very common workflow for both. One note is that you need to also find a sysmon config to use as well, and there's no easy way to manage either sysmon or its config through Splunk. Recommendations for a config are either SwiftOnSecurity's or Olaf's SysmonModular. They significantly overlap and work with each other on patches. SwiftOnSecurity's is a better pure drop-in, and Olaf's is better if you want to do customization.

For some of the items you mentioned having a good sysmon config would help too. https://github.com/SwiftOnSecurity/sysmon-config or https://github.com/olafhartong/sysmon-modular are good starting points

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.