On August 15th the NSA and FBI published a joint security alert containing details about a previously undisclosed Russian malware. The agencies say that the Linux strain malware has been developed and deployed in real-world attacks by Russian military hackers.

GuLoader is a sophisticated malware downloader that stores its payloads in Google Drive and Microsoft OneDrive. In addition to using popular cloud apps to evade network-based detection, it uses anti-VM techniques to evade sandbox analysis. Since it was first discovered in December 2019, GuLoader has become one of the top malware delivery mechanisms observed in the wild. It is used by multiple threat actors to deliver a variety of threats, most commonly remote access Trojans (RATs).