Linux Security
Investigating Linux Process File Descriptors for Incident Response and Forensics
Let’s talk about Linux file descriptors and how to investigate a malicious process using them. What Is a File Descriptor? Since the inception of Unix (on which Linux is based), everything is a file.…
Getting In The Fight
Let’s talk about how to be effective detecting intruders. Or what we at Sandfly Security simply call: Getting in the fight . First to lay some groundwork, the policy of Sandfly Security is that we…
Linux Stealth Rootkit Process Decloaking Tool – sandfly-processdecloak
We have released a new tool called sandfly-processdecloak to help find and decloak Linux stealth rootkits automatically. This tool was released as a response to the disclosure by the FBI and NSA of a…
Detecting Linux memfd_create() Fileless Malware with Command Line Forensics
A developing threat to Linux over the last several years has been the idea of fileless malware. Fileless Linux malware is difficult to detect. It's designed to inject itself into a running Linux…
Using Elasticsearch and Kibana to Investigate Suspicious Linux Activity with Sandfly
In this video we’re going to show you how to use Sandfly with Elasticsearch Kibana dashboards to search for and investigate a suspicious process on Linux. We’ll go over Sandfly’s agentless collection…
Detecting Linux Kernel Process Masquerading with Command Line Forensics
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…