New RussiaLinked GREYVIBE Targets Ukraine with AIPowered Cyberattacks

A previously undocumented threat actor dubbed GREYVIBE has been attributed to ongoing and persistent attacks targeting Ukraine and Ukrainerelated entities since at least August 2025 GREYVIBE per WithSecure is assessed to be a Russianspeaking group operating broadly in the Russian time zone with the activities aligning with Kremlin state interests specifically when it comes to