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

HollowGraph, Malware, Malware & Threats /

New HollowGraph Malware Abuses Microsoft 365 Calendar for C&C Communication 2026-07-21 at 14:55 By Ionut Arghire 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. This article is an excerpt from SecurityWeek […]

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