[H4ckN3ws]HollowGraph Malware Hides C2 and Stolen Files in Microsoft 365 Events Dated 2050

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A newly discovered espionage implant has been using a hijacked

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365 calendar as its command channel, planting operator instructions and smuggling out stolen files as attachments on calendar events dated to the year 2050. Group-IB, which named the malware HollowGraph, says the approach moves tasking and stolen data through legitimate

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Graph API traffic, so the activity looks

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