Overview LAB52 has been monitoring a campaign dubbed “Operation MacroMaze”, which, based on its characteristics, can be attributed to APT28, also known as Fancy Bear, Forest Blizzard or FROZENLAKE. The campaign has been active at least since late September 2025 through January 2026, targeting specific entities in Western and Central Europe. The campaign relies on […]
APT28
Analyzing NotDoor: Inside APT28’s Expanding Arsenal
LAB52, the intelligence team at S2 Grupo, has identified a new backdoor for Outlook attributed to the persistent threat group APT28, which is linked to the Russian intelligence service and has compromised multiple companies from various sectors in NATO member countries. The artefact, dubbed NotDoor due to the use of the word ‘Nothing’ within the […]