Our brand new ASGARD 1.7 comes with a shiny new feature: Evidence Collection The evidence collection feature allows you to collect files or main memory from connected end systems. The memory and file collection tasks provide a throttling option to reduce the upload...
YARA is an awesome tool especially for incident responders and forensic investigators. In my scanners I use YARA for anomaly detection on files. I already created some articles on "Detecting System File Anomalies with YARA" which focus on the expected contents of...
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...
While analysing several suspicious DLL files I noticed that some of these files (which were obviously malicious) didn't perform their malicious activity unless a certain function was triggered. The malware used a registry entry to execute a certain function that is...
As a follow up on my first article about inverse matching yara rules I would like to add a tutorial on how to scan for system file manipulations using Yara and Powershell. The idea of inverse matching is that we do not scan for something malicious that we already know...
During our investigations we encountered situations in which attackers replaced valid system files with other system files to achieve persistence and establish a backdoor on the systems. The most frequently used method was the replacement of the "sethc.exe" with the...