February 13, 2025

The BadPilot campaign: Seashell Blizzard subgroup conducts multiyear global access operation

Microsoft is publishing for the first time our research into a subgroup within the Russian state actor Seashell Blizzard and its multiyear initial access operation, tracked […]
January 17, 2025

New Star Blizzard spear-phishing campaign targets WhatsApp accounts

In mid-November 2024, Microsoft Threat Intelligence observed the Russian threat actor we track as Star Blizzard sending their typical targets spear-phishing messages, this time offering the […]
December 12, 2024

Frequent freeloader part II: Russian actor Secret Blizzard using tools of other groups to attack Ukraine

After co-opting the tools and infrastructure of another nation-state threat actor to facilitate espionage activities, as detailed in our last blog, Russian nation-state actor Secret Blizzard […]
December 5, 2024

Frequent freeloader part I: Secret Blizzard compromising Storm-0156 infrastructure for espionage

Based on both Microsoft Threat Intelligence’s findings and those reported by governments and other security vendors, we assess that the Russian nation-state actor tracked as Secret […]