Rootkits
Detecting and Investigating OpenSSL Backdoors on Linux
A nightmare for security personnel on Linux is to find a backdoor operating. This means an attacker is interacting with the host in real-time to further their intrusion. Of various backdoors that can…
Linux Malware Investigation Myth: You Don’t Need a Debugger
A big myth around investigating Linux ransomware and malware is that the first tool you need is a debugger and deep knowledge of assembly to understand what it does. It’s easy for admins and 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.…
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…
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…