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HollowGraph Malware Hides C2 and Stolen Files in Microsoft 365 Events Dated 2050
lowmalware2026-07-20T14:33:43+00:00source excerpt
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A newly discovered espionage implant has been using a hijacked Microsoft 365 calendar as its command channel, planting operator instructions and smuggling out stolen files as attachments on calendar events dated to the year 2050.