#hollowgraph

New HollowGraph malware uses Microsoft Graph for stealthy C2 comms

Jul 20, 2026 // 20:57

A malicious component dubbed HollowGraph uses the calendar feature in compromised Microsoft 365 mailboxes as a command-and-control channel to receive attacker commands and exfiltrate stolen […]

HollowGraph Malware Hides C2 and Stolen Files in Microsoft 365 Events Dated 2050

Jul 20, 2026 // 17:38

A newly discovered espionage implant has been using a hijacked Microsoft 365 calendar as its command channel, planting operator instructions and smuggling out stolen files […]