MISP to Microsoft Sentinel integration with Upload Indicators API

The MISP2Sentinel integration allows you to sync indicators from MISP to Microsoft Sentinel. The old integration relied on the Microsoft Graph API. Microsoft prefers new integrations to rely on the Upload Indicators API. The new MISP to Microsoft (previously Azure) Sentinel or misp2sentinel does just that, it

Supports integration with the old Graph API, but also It supports the new, and preferred, Upload Indicators API.

Read the installation and configuration documentation at https://github.com/cudeso/misp2sentinel forRead more.

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.

ENISA Threat Landscape 2022

I contributed to the ENISA Threat Landscape 2022. The ETL is an annual report on the status of the cybersecurity threat landscape. It identifies the top threats, major trends observed with respect to threats, threat actors and attack techniques, as well as impact and motivation analysis. It also describes relevant mitigation measures.

Get a copy of the ENISA Threat Landscape 2022.

Down the Chainsaw path to analyse Windows Event logs

Chainsaw is a tool to rapidly search through large sets of Windows Event logs. In this post I briefly go through the steps that I take to collect, process and analyse logs from different Windows machines and then use them for analysing Windows Event logs. Obviously it’s always better to use centralised logging and apply your detection techniques centrally but unfortunately this isn’t always possible.

Although Chainsaw is available as a binary packageRead 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.

Cyberweapons Arms Race

I recently finished the book “This Is How They Tell Me the World Ends: The Cyberweapons Arms Race” by Nicole Perlroth. The book covers the story of the cyberweapons market and how government agencies fuelled this economy, eventually making the Internet a less safer place for us all.

I added some notes of items of interest in a mindmap that are maybe of use for others. The map is not complete at all, feel freeRead 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.

MISP and Microsoft Sentinel

A short post with things to consider when integrating MISP threat intelligence with Microsoft Sentinel. There are two documentation resources that describe the integration in detail and should get you started in no-time:

External Connectors for MISP Integrating open source threat feeds with MISP and Sentinel

This error is caused by invalid client secret or missing client ID. One of the steps in the documentation involves creating a new secret. You then have to addRead more.

Using VMRay Analyzer for Initial Triage and Incident Response

I published an article on the blog of VMRay: Using VMRay Analyzer for Initial Triage and Incident Response.

In this article I cover a practical case study how VMRay Analyzer helped with getting an accurate and noise-free analysis for initial triage and obtaining the relevant indicators of compromise for faster incident response.

Key recommendations and findings from the HSE Conti ransomware attack

The healthcare sector has been in the crosshairs of ransomware gangs.

One of the victims of last year was Ireland’s Health Services Executive. A report analysing the Conti ransomware attack was published as a follow-up to the incident. This Independent Post Incident Review provides a long list of recommendations that are not only valuable for the HSE but read as a “must-do” list for other organisations to be better prepared for such ransomware incidents.

IRead more.