SecurityThe Hacker Newsabout 15 hours ago
HollowGraph Malware Hides in 2050 Calendar Events
1 min read
Group-IB discovered HollowGraph, an espionage implant that uses hijacked Microsoft 365 calendars as a command channel. The malware plants operator instructions and exfiltrates stolen files as attachments on calendar events dated 2050. It never contacts attacker-owned servers, making detection difficult. Group-IB ties HollowGraph to the Cavern framework with high confidence.
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