In anticipation of our new scanner THOR 10 Fusion, we would like to show you some of the exciting new features and upcoming changes. Modes and Feature Cleanup We've reviewed and reworked all scan modes in order to clarify the overview of active modules and features...
A long time ago I've noticed that there is no single best YARA rule for a given sample, but different best solutions depending on the user's requirements and use case. I noticed that I often create 2 to 3 YARA rules for a single sample that I process, while each of...
Working in incident response or malware analysis, you may have come across compromised and sometimes revoked certificates used to sign malware of different types. Often threat groups use stolen certificates to sign their malware. I'd like to show you an easy way to...
The new THOR-util version 1.2.4 supports the encryption of your custom signatures so that you can deploy your own IOC files and YARA rules in an encrypted form. We use a public key in the utilities to encrypt the files for our scanners so that admins, Antivirus...
LOKI THOR Lite THOR Description LOKI is an open-source IOC and YARA scanner written in Python. THOR Lite is a free version of our THOR scanner shipped with LOKI’s open source signature based and a limited module and feature set. THOR is our full-featured scanner with...
In the recent months I had several talks with friends and coworkers about IOC scanning and how to integrate IOCs from threat intel feeds into our scanners or other products that our customers already use. People often tell me that EDR or client management product X...
During the last four years, I was engaged on incident response teams for several large advanced persistent threat (APT) cases involving different German corporations. In this time, we have developed methods and tools to detect compromised systems, while also planning...
Today most security teams have access to a lot of different information sources. On the one hand they collect log data from different sources and try to correlate them in a useful way in so-called SIEM systems. On the other hand they receive threat information from...
SysInternals Sysmon is a powerful tool especially when it comes to anomaly detection. I recently developed a method to detect system file manipulations, which I would like to share with you. We know how to track processes with the standard Windows audit policy option...
People often ask me, why we changed the name of our scanner from "IOC" to "APT" scanner and if we did that only for marketing reasons. But don't worry, this blog post is just as little a sales pitch as it is an attempt to create a new product class. I'll show you why...
During the last 2 years I wrote approximately 2000 Yara rules based on samples found during our incident response investigations. A lot of security professionals noticed that Yara provides an easy and effective way to write custom rules based on strings or byte...
In den vergangenen Monaten konnten wir mehrere Kunden bei der Bewältigung und Behandlung massiver Angriffe unterstützen. Zufällige Entdeckungen im Kundennetz zeigten in allen Fällen nur die "Spitze es Eisbergs" größerer und länger andauernder Attacken. Nachdem ein...