Linux Security
SSH Key Compromise Risks and Countermeasures
When it comes to securing Linux systems, Secure Shell (SSH) has been one of the most dependable tools at a sysadmin's disposal. However, with every technology solution, there are potential pitfalls…
SSH Major Compromise Vector for Linux
Google just released their Cybersecurity Action Team Report for the end of 2022 and it had some interesting findings: More than 1/2 of all incidents involved weak credentials, no credentials, or…
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…
Leveling Up Your Linux Security
We get fan mail about Sandfly and how we've helped people, but we're even more excited when we get a fan blog post. A user of Sandfly writes about their experience from the perspective of a SOC…
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,…