In a report published on the 20th of December CrowdStrike published a report of a new technique exploiting the Microsoft Exchange vulnerability called ProxyNotShell. The called the new technique OWASSRF as it uses Outlook Web Access, CVE-2022-41080 and CVE-2022-41082...
Sigma Rule Feed in Valhalla
Nextron Systems has always supported the Sigma project, investing hundreds of work hours into creating and maintaining the community rules shared in the public Sigma rule repository. Apart from the community support, we've created a set of internal detection rules for...
ASGARD 2.14 Release
We've just released the new ASGARD Management Center version 2.14 with important new features. This blog posts lists the most important changes in dedicated chapters. The whole change log can be found at the end of the article. Broker Network The Broker Network allows...
Mjolnir Security: Blue Team Incident Response Training
Our partner Mjolnir Security offers a training named “Blue Team Incident Response Training” from 19th of September to 23rd of September. It’s 3,5 hours a day, starting 4:00 pm and finishing 7:30 pm Eastern time. Each session will be recorded, so you'll also be able to...
Antivirus Event Analysis Cheat Sheet v1.10.0
We've updated our Antivirus Event Analysis Cheat Sheet to version 1.10.0. It includes updates in several sections add special identifiers for Sliver and Brute Ratel C4 framework implants many new tags for Virustotal assessments You can download the new version here....
THOR TechPreview 10.7.3 Features
THOR TechPreview version 10.7.3 has been released Parsing of email formats .eml / .msg to scan the attachments (RFC-6532) Archive scan improved to include .cab, .7z and .gzip Archive scan improved to scan nested archives recursively Bulk scanning improvements to...
New Analysis Cockpit 3.5
New Baselining Views Over the course of the last 18 months we reviewed most of our detections regarding their success in real world scenarios. In this context "success" means, that the detection uncovered malicious activity in the wild and at the same time had a low...
Follina CVE-2022-30190 Detection with THOR and Aurora
The Follina 0day vulnerability (CVE-2022-30190) in Microsoft Windows is actively exploited in-the-wild and highly critical. This blog posts lists some important web resources and the signatures that detect exploitation attempts.Kevin's post contains links to tweets of...
ASGARD v2.13 Release
Over the last 4 months, we've worked on many new UX improvements and the integration of our endpoint agent Aurora. Today, we are glad to announce the release of ASGARD version 2.13. UX Improvements We've reworked many sections and dialogues with user experience (UX)...
Aurora Lite Agent v1.0 Release
After almost half a year of development, we are pleased to announce the release of our free version of the Aurora Agent named Aurora Lite. The Aurora agent is a Sigma-based endpoint agent that offers maximum transparency, flexibility, and confidentiality. It doesn't...
Antivirus Event Analysis Cheat Sheet v1.9.0
We've updated our Antivirus Event Analysis Cheat Sheet to version 1.9.0. It includes updates in almost all sections add special indicators for all kinds of Microsoft Exchange exploitation activity (ProxyLogon, ProxyShell etc.) moves Ransomware indicators to highly...
ASGARD v2.12 Released
The new ASGARD Management Center version 2.12 adds new features and fixes several issues that were introduced with the version 2.11 in December last year.Better Sigma Rule Management We've added new features and improved the usability of the sigma rule management...