Compass Security Blog

Offensive Defense

Compass Incident Handling and Forensics Number Crunching

The anonymous data on our cases allows us to answer the question “What is a typical DFIR case at Compass Security?” and we conclude its the analysis, containment, eradication and recovery of one or a few devices in a Windows domain which is probably no surprise :)

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A Symmetric Cipher Ransomware … YES!

One of the rare cases where we can decrypt and recover files following-up with a ransomware attack.

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Tutorial on how to Approach Typical DFIR Cases with Velociraptor

This post provides ideas of processes to follow and gives basic guidance on how to collect, triage and analyze artifacts using Velociraptor

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VPN Appliance Forensics

During a DFIR (Digital Forensics and Incident Response) Case, we encountered an ESXi Hypervisor that was encrypted by the Ransomware LockBit 2.0. Suspicious SSH logons on the Hypervisor originated from an End-of-Life VPN Appliance (SonicWall SRA 4600). It turns out, this was the initial entry point for the Ransomware attack. Follow us into the forensics […]

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Docker Forensics

Sometimes one goes deep down the rabbit hole, only to notice later that what we were looking for is just under one’s nose.

This is the story of a digital forensic analysis on a Linux system running docker containers. Our customer was informed by a network provider that one of his system was actively attacking other systems on the Internet. The system responsible for the attacks was identified and shut down.

Our DFIR hotline responded to the call and we were provided with a disk image (VMDK) to perform a digital forensic analysis.

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Straightforward Mobile Forensics

We put more and more sensitive data on mobile devices. For many private conversations we use mobile applications, such as WhatsApp. This smooth access to the data and the Internet provides multiple benefits in our lives. On the other side, new attack vectors are created. Phishing messages do not need to be delivered in an […]

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The “Volatility Triage App” for Splunk

Intro into a Compass Splunk App, which can be used to perform a first triage and high level analysis of Volatility results coming from multiple hosts.

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Reversing a .NET Orcus dropper

In this blog post we will reverse engineer a sample which acts as downloader for malware (aka a “dropper”). It is not uncommon to find such a downloader during DFIR engagements so we decided to take a look at it. The sample that we are going to analyze has been obtained from abuse.ch and was […]

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Invoice Fraud with Everything the Bag of Tricks Has to Offer

Sometimes, it doesn’t take much for a good scam: a good story, a little persuasion, then disappear again… and sometimes, the scammers come up with tactics that come straight out of the textbook.

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Challenging Your Forensic Readiness with an Application-Level Ransomware Attack

Ransomware focuses on encrypting data on a filesystem-level, either locally on infected client systems or remotely on accessible file servers. However, what if ransomware would start encrypting data on an application-level too?

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