In today's interconnected world, cyber adversaries are increasingly targeting and exploiting Internet-facing appliances and devices with unconventional or restricted operating systems. A pressing concern for users is whether it's possible to perform a compromise...
Hunting Ducks – A Threat Hunters Take on Ducktail Stealer
This post will look into DuckTail Stealer and their current .NET-based payloads. The stealer is well known for targeting marketing companies. Ducktails attacks usually come via email, posing as marketing campaigns or hiring offers. They use legitimate cloud hosts like...
New THOR 10.7.8 TechPreview Features
We are thrilled to unveil THOR 10.7.8, the latest version of our advanced persistent threat (APT) scanner, which brings a host of powerful features to enhance threat detection and analysis. In this blog post, we will highlight some of the notable additions that make...
Scanning for Indications of MOVEit Transfer Exploitation with THOR Lite
On June 1st, the vendor of MOVEit Transfer, previously known as Ipswitch but now called Progress, announced the discovery of a critical security vulnerability that has been exploited. MOVEit is an enterprise software utilized by numerous organizations globally for...
How to scan Docker containers using THOR – Part 2
The first part of this blog series covers how THOR can be used to scan a Docker image. In the second part of this series, we will talk about how you can use THOR to scan running Docker containers. Now, consider this new use case: You want to check if your running...
How to scan Docker images using THOR – Part 1
In this blog article, we will talk about how you can use THOR to scan Docker images. Consider the following use case: Before using an upstream Docker image, you want to precheck it for known IOCs and backdoors. THOR can help you with this!Prerequisites Docker image...
Customer Portal Upgrade – Planned Downtime
We would like to inform you that our customer portal will be undergoing a scheduled maintenance and will be temporarily unavailable on Wednesday, April 12, 2023, between 10:00am and 11:00am CEST. We apologize for any inconvenience this may cause. During this downtime,...
Using THOR Lite to scan for indicators of Lazarus activity related to the 3CX compromise
On March 29, 2023 CrowdStrike detected malicious activity, originating from a legitimate, signed binary called 3CXDesktopApp. The binary is part of a softphone system developed by 3CX.The observed malicious activity consisted of beaconing to infrastructure controlled...
Demystifying SIGMA Log Sources
One of the main goals of Sigma as a project and Sigma rules specifically has always been to reduce the gap that existed in the detection rules space. As maintainers of the Sigma rule repository we're always striving for reducing that gap and making robust and...
Private Sigma Rule Feed in Valhalla and Partnership with SOC Prime
We are proud to announce the integration of our private Sigma rule set in Valhalla. This rule set is used in our scanner THOR and endpoint agent Aurora. The rule set currently contains more than 250 quality-tested and generic rules written by Nextron's detection...
THOR Log Conversion to CSV
We are excited to announce that the upcoming version 1.11 our tool, THOR Util, now has the capability to convert log output files from both the default and JSON format into CSV files. This new feature will make it easier for users to analyze their log data and extract...
How to scan ESXi systems using THOR
More and more often, adversaries target and exploit Internet-facing appliances or devices with exotic or restricted operating systems. Users ask if there is a way to run a compromise assessment scan on these systems with the YARA rules used in THOR. Following up on...