Linux Forensics
Sandfly Linux File Entropy Scanner Updated
Our entropy scanner sandfly-filescan has been updated and renamed to sandfly-entropyscan and now features Linux process scanning to help quickly spot packed and encrypted malware. You can get it…
BPFDoor - An Evasive Linux Backdoor Technical Analysis
Recently Kevin Beaumont revealed a new evasive backdoor targeting Linux associated with the Chinese Red Menshen threat actors. In his article he reveals that this backdoor has been operating globally…
Log4j Kinsing Linux Stealth Malware in the Wild
A severe vulnerability in the popular Java Log4j package ( CVE-2021-44228 ) allows remote code execution on Linux and other platforms. Within about a day of being publicized, the cryptomining malware…
Linux Stealth Rootkit Malware with EDR Evasion
Recently, Sandfly was contacted to investigate an incident involving a novel piece of Linux stealth malware. What made this malware interesting is it deployed a full stealth rootkit to hide itself,…
Detecting CronRAT Crontab Malware on Linux
Security researchers recently discovered a new kind of Linux malware that was hiding its payload as part of an illegal crontab entry on Linux. The malware is being used to insert card skimming…
Linux Command Line Forensics and Intrusion Detection Cheat Sheet
Below is our Linux command line forensics and intrusion detection cheat sheet along with a presentation given at Purplecon 2018 . These resources can help you investigate a Linux host for compromise…