Kaspersky Lab uncovered a new zero-day, or cyber vulnerability, in August in the Microsoft Windows operating system which Microsoft patched this Tuesday after Kaspersky notified the company.

Why it matters: The cyber espionage group "FruityArmor," which is likely responsible for this zero-day, has slowly been ramping up activity over the past two years, Kaspersky assesses.

The details: Kaspersky links FruityArmor with this vulnerability since the group has previously used the same backdoor that ran the exploit in Microsoft's operating system most recently. The attack was “highly targeted” against victims located in the Middle East, per Kaspersky Lab, and was delivered by a PowerShell backdoor.