New HollowGraph Malware Abuses Microsoft 365 Calendar for C&C Communi… | HappeningNow.news
Published Date: July 21, 2026

Cybersecurity · 1 views

New HollowGraph Malware Abuses Microsoft 365 Calendar for C&C Communication

Part of a larger toolkit, HollowGraph uses a compromised 365 account’s calendar as a two-way dead-drop.

Source SecurityWeek AI Summary Updated 5h 20m ago
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Freshness Fresh Updated 5h 20m ago
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Read time 1 min ~33 words

AI Summary

Part of a larger toolkit, HollowGraph uses a compromised 365 account’s calendar as a two-way dead-drop. The post New HollowGraph Malware Abuses Microsoft 365 Calendar for C&C Communication appeared first on SecurityWeek .

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