Based on Lubuntu-18.04 x64, the RedHunt Linux virtual machine for adversary emulation and threat hunting is a “one stop shop for all your threat emulation and threat hunting needs. It integrates an attacker’s arsenal as well as defender’s toolkit to actively identify the threats in your environment.”
RedHunt Linux is available as an OVA virtual machine file from http://bit.ly/RedHUNTv1. I imported it with ease via VirtualBox and was up and running in minutes. This distribution includes tools for attack emulation, logging and monitoring, open source intelligence (OSINT) gathering and threat intelligence. As such, I’m going focus on one each from attack emulation, OSINT, and threat intelligence. The virtual machine username and password are hunter. The menu is simple and laid out categorically, you’ll have no trouble navigating accordingly. I’ll follow the same sequence for continuity.
Of the attack emulation tool list, there are a few I’ve been meaning to test prior to spotting RedHunt, this is a nice opportunity to do so on a ready made platform. There are a few that may be new to you so allow me to break them down a bit. You’ll notice the Mitre ATT&CK framework leveraged throughout.
I’ll focus specifically on Metta. I used the RedHunt Linux VM instance itself as my targert and ran the following OS-appropriate scenario, resulting in output as noted in Figure 1.
Figure 1: Metta Linux credential access bash history results
As expected, when I reviewed /var/log/auth.log, Metta’s activity was immediately evident, as seen in Figure 2.
Figure 2: /var/log/auth.log Metta entries
One can imagine that a properly configured detection and alerting scenario should have effictively triggered and fired if tuned to react to such behaviors.
The OSINT selection includes Maltego, Recon-ng, and Datasploit, all of which I’ve covered in earlier toolsmith articles, as far back as December 2009 for Maltego.
and received results as seen in Figure 3.
Figure 3: theHarverster Twitter search results
Finally, in the threat intelligence offerings you’ll find Yeti and Harpoon. I’ll focus on Yeti for our purposes here. Yeti is “a platform meant to organize observables, indicators of compromise, TTPs, and knowledge on threats in a single, unified repository. Yeti will also automatically enrich observables (e.g. resolve domains, geolocate IPs) so that you don’t have to.” Yeti is really where the rubber hits the road for me with the RedHunt OS. I’ll set up a real world scenario for you with Yeti, using it in what could be considered a production manner. Do add your API keys under the user profile so you can take advantage of analytics functionality.
Figure 4: Yeti import function
Yeti then presents you with what it determines are the observables by categories, IP, hostname, and hash in this scenario. Scroll down the list and then choose Import. If you then go to Observables, then Browse, you’ll see all the IOCs you just imported. Organizationally, you can/should tag the entities as they’re associated (xagent, computrace, xtunnel, zebrocy) in the report. You’ll also want to go to Investigations, then List, and select Unnamed. Choose the Investigation you just imported and tagged, name it and save it accordingly. I used APT28 NCSC for mine. You can add a new Actor via the New menu. Again, APT28 makes sense here, and you can mark this Actor entity with your above created tags. Similarly, you can bind to entities with the same tags. I did the same thing again with a Campaign, also calling it APT28 NSCS. I then drilled to Entities and selected this campaign. I created a new Investigation then selected Go To Graph.
Figure 5: Yeti Graph
Select an individual node or all nodes then run a variety of analytics (Figure 6). These depend on the API keys you set in your profile as discussed earlier.
Figure 6: Yeti Analytics
Figure 7: Yeti Yara import
I intend to continue using RedHunt Linux beyond simply testing it for toolsmith. I’m particularly invested in Yeti and recognize of only touched on the basics of its use here. I plan to dig into the API and export, there are numerous interesting features yeti to explore. :-) Yeti is definitely a truly viable option for managing your threat intelligence practice.
Oct 17th 2018
3 months ago