HOLLOWGRAPH, a Windows malware implant that transforms Microsoft 365 calendar events into a covert command-and-control channel. This malware, which is highly likely linked to the Cavern modular backdoor framework, utilizes the Microsoft Graph API to retrieve tasks from operators and to exfiltrate stolen data via a compromised Microsoft 365 mailbox. This technique enables malicious communications […] The post HOLLOWGRAPH Malware Turns Microsoft 365 Calendar Events Into Covert Command-and-Control Channels appeared first on GBHackers Security | #1 Globally Trusted Cyber Security News Platform.
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