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 as … Read more.

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 threat … Read more.

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 as … Read more.

For a new assignment I wanted to use JARM to group servers with a similar configuration. Why JARM? Because it’s an easy way to quickly identify and group servers based on their configuration.

JARM is an active fingerprinting of TLS servers made available by Salesforce Engineering. It sends 10 TLS Client Hello packets to a server and captures specific attributes of the responses. These responses are then aggregated and hashed. A JARM fingerprint consists of … Read more.

MISP correlations are a way to find relationships between attributes and indicators from malware or attacks campaigns. Correlation support analysts in detecting clusters of similar activities and pivot from one event to another.

When the volume of data in your MISP instance grows, the number of correlations can however explode and make your system less responsive. I cover some approaches that you can use to stay in control.

Correlation basically is a way for … Read more.