Dossier
HollowGraph
Coverage of HollowGraph in the Nexus archive.
- HollowGraph Malware Hides C2 and Stolen Files in Microsoft 365 Events Dated 2050
HollowGraph malware, discovered by Group-IB, uses hijacked Microsoft 365 calendars as a command channel, hiding operator instructions and stolen files in calendar events dated 2050. The malware leverages Microsoft Graph API traffic to blend malicious activity with legitimate traffic.