Blog

Detecting Linux Kernel Process Masquerading with Command Line Forensics

Malware
Rootkits
Linux Security
Linux Forensics
March 30, 2020

Linux kernel process masquerading is sometimes used by malware to hide when it is running. Let’s go over how you can unmask a piece of Linux malware using this tactic. What is Linux Kernel Process…

How To Decloak Stealth Linux Cryptocurrency Mining Malware

Malware
Rootkits
Linux Security
Linux Forensics
December 16, 2019

Increasingly on Linux we are seeing malware deploying anti-detection and evasion tactics. In this post we’re going to go over a recent piece of malware that used a commonly available tool for hiding…

Sandfly Filescan Open Source File Entropy Scanner for Linux

Malware
Rootkits
Linux Forensics
Linux Security
November 25, 2019

We’re releasing an open source tool today called sandfly-filescan . Sandfly-filescan allows Linux admins and incident responders to quickly scan for compressed or encrypted executable files often…

Basic Linux Malware Process Forensics for Incident Responders

Malware
Rootkits
Linux Security
Linux Forensics
September 30, 2019

Let’s go step-by-step and do some basic live process forensics for Linux. Today’s attack is a bind shell backdoor waiting for a connection on Ubuntu. Simulated Bind Shell Attack If you want to…

Using Linux utmpdump for Forensics and Detecting Log File Tampering

Malware
Rootkits
Linux Security
Linux Forensics
July 31, 2019

In this post we’re going to show you how to use utmpdump for investigating Linux audit logs for signs of compromise. Seemingly unknown by many, the utmpdump command is a great tool for Linux…

Getting an Attacker IP Address from a Malicious Linux At Job

Malware
Rootkits
Linux Security
Linux Forensics
July 25, 2019

Attackers on Linux often try to establish persistence so they can maintain access to a host. The most common way to do this is with a cron job that is scheduled to run and re-install malware if it…