Russia-linked APT28 uses PRISMEX to infiltrate Ukraine and allied infrastructure with advanced tactics

APT28 targets Ukraine and allies with PRISMEX malware, using stealthy techniques for espionage and command-and-control. Russia-linked group APT28 (aka UAC-0001, aka Fancy Bear, Pawn Storm, Sofacy Group, Sednit, BlueDelta, and STRONTIUM) is running a spear-phishing campaign against Ukraine and its allies, deploying a new malware suite called PRISMEX. Active since September 2025, the campaign uses advanced stealth techniques like steganography and […]