When the news broke in 2014 about a new sophisticated threat actor dubbed the Turla Group, which the Estonian foreign intelligence service believes has Russian origins and operates on behalf of the FSB, its kernelmode malware also became the first publicly-described case that abused a third-party device driver to disable Driver Signature Enforcement (DSE). This security mechanism was introduced in Windows Vista to prevent unsigned drivers from loading into kernel space. Turla exploited the signed VirtualBox driver, VBoxDrv.sys v1.6.2, to deactivate DSE and load its unsigned payload drivers afterward.