Malware
Getting an Attacker IP Address from a Malicious Linux At Job
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…
Detecting and De-Cloaking HiddenWasp Linux Stealth Malware
A new Linux stealth malware was discovered by researchers last week . The malware, named HiddenWasp, is a remote access tool that has two modes of infection depending on whether it has root level or…
How To Recover A Deleted Binary From Active Linux Malware
Often, Linux malware will delete itself after it starts so that file scanners and integrity checks won’t see the binary present. It also can make forensic analysis harder if you can’t get to the…
Using Linux Process Environment Variables for Live Forensics
In this post and video we’re going to explore the Linux /proc directory further by digging into a live process and the environment variables it presents. The basic format for the command we’ll use is…
Using Command Line Tools to Find Process Masquerading Linux Malware
In this video Sandfly founder Craig Rowland goes over the basics behind using command line tools on Linux to look into a suspicious process. You’ll learn how to start a benign process and have it…
Why You Must Monitor Linux for Signs of Intruders
When Sandfly Founder Craig Rowland was brought in to do his first penetration test many years ago, one of the first systems he broke into was a Unix system that had an uptime of four years. The box…