Include threat information from MISP in Zeek network visibility

Zeek (formerly Bro) is a free and open-source software network analysis framework. It gives insights on DNS queries, HTTP and TLS information and details on transmitted files. I find Zeek one of the best network monitoring tools available to provide detailed visibility on network traffic.

Zeek has a built-in intelligence framework. This framework allows you to add information received via MISP directly into the network visibility capabilities of Zeek. This includes

Visits to URLs orRead more.

CTI-Summit 2022 Luxembourg Presentations

The first edition of the Cyber Threat Intelligence Summit took place in Luxembourg in October 2022. I did two presentations:

One presentation on MISP web scraper, a tool to create MISP events and reports from scraped websites; and one presentation on building CTI Operational Procedures with Jupyter Notebooks and PyMISP.

The slides and recording are available on GitHub and Youtube.

Slides: https://github.com/cudeso/misp-tip-of-the-week/tree/main/CTIS-2022; Recording of CTI Operational Procedures with Jupyter Notebooks and PyMISP; Recording of MISPRead more.

MISP web scraper

I published an article on the MISP project website on the MISP web scraper.

There are a lot of websites that regularly publish reports on new threats, campaigns or actors with useful indicators, references and context information. Unfortunately only a few publish information in an easily accessible and structured format, such as a MISP-feed. As a result, we often find ourself manually scraping these sites, and then copy-pasting this information in new MISP events. TheseRead more.

Analysing Amazon AWS security groups and access control lists

Analysing firewall rules in AWS can be complex. There are Security Groups (SG) as well as Access Control Lists (ACL). Security groups are applied on instances and are the first layer of defense, whereas access control lists are applied on network components (subnets) and are a second layer of defense. A major difference is that SGs are stateful, whereas ACLs are stateless. From a filtering perspective there is also a difference. In security groups allRead more.

MISP sharing groups demonstration video

Sharing groups in MISP are a more granular way to create re-usable distribution lists for events/attributes that allow users to include organisations from their own instance (local organisations) as well as organisations from directly, or indirectly connected instances (external organisations).

For a possible future project I had to document if sharing groups are an answer for a sort of multi-tenancy for sharing threat events within MISP.

Sharing groups certainly provide an answer, as long asRead more.

Integrate DFIR-IRIS, MISP and TimeSketch

I published a set of scripts that I use to integrate

Threat events and indicators stored in MISP; CSIRT case handling data such as events, IOCs, timelines, assets and evidences in DFIR-IRIS; Analysis events on PCAP and EVTX files in TimeSketch.

The Python scripts tie everything together between MISP, IRIS and TimeSketch. The scripts and example usage, with screenshots, are published in a Github repository: https://github.com/cudeso/dfir-iris-misp-timesketch.

The scripts make it possible to document threatRead more.

Visualising MISP galaxies and clusters

The MISP galaxies and clusters are an easy way to add context to data. I’ve previously written an article “Creating a MISP Galaxy, 101” that describes how you can create your own galaxy and cluster.

Apart from the context, galaxies and clusters also allow you to describe relations between individual elements. These relations can for example be the synonyms (naming) for an APT group or the fact that a specific group uses a (MITRE ATT&CK)Read more.

Send malware samples from MISP to MWDB (Malware Repository)

I use a MISP instance to store malware samples that I came across during an investigation or incident. I also worked for example on an integration via a MISP module with the VMRay malware sandbox. The setup with MISP works very well but I needed an easier solution to make these samples available to other users (and tools), without the need of access to this MISP instance.

Enter Malware Repository MWDB, formerly known asRead more.

Install Elastic Filebeat as daemon on OSX

Filebeat is a lightweight shipper for logs. You can use it to collect logs from endpoints and store them centrally in Elastic. You can use it to collect logs from Linux systems, but it also works on Apple OSX. Installing filebeat is straightforward

After installing filebeat you have to enable the system module

Then update the configuration file (filebeat/filebeat.yml)

I used the information from a support post on the Elastic site: https://discuss.elastic.co/t/deploying-filebeat-on-macos-x/37785/11. This post describesRead more.

Use Mobile Verification Tool to check if your iPhone is affected by Pegasus spyware

The Pegasus spyware made by the Israel-based company NSO Group has been used in targeted surveillance attacks against activists, journalists and businesspeople. Its details, and methods to detect it, were revealed by CitizenLab (hacks from the Bahraini government on activists) with a forensic methodology report made available by Amnesty International.

Because both the tools and the indicators of compromise are made available it’s fairly easy to do these checks yourself.

Setup a Python virtual environmentRead more.