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

ID: 23bedcdf-a18d-574d-ab43-9df1144d2816

STIX ID: report--23bedcdf-a18d-574d-ab43-9df1144d2816

Feed Name: SecurityWeek

Date Published: 2026-07-21

Date Updated: 2026-07-21

Author: Ionut Arghire

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This document is a short SecurityWeek Daily Briefing subscription/unsubscribe notice and does not include any cybersecurity incident details, indicators of compromise, technical analysis, or threat actor information.

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