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Threat actor

Cavern Manticore

Tracked by CyberSIXT since Jul 6, 2026 · last activity Jul 21, 2026

Linked incidents

malware closed 3 articles

HollowGraph malware exploits Microsoft 365 calendar for covert command-and-control

campaign closed 3 articles

Cavern Manticore APT conducts cyber-espionage campaign against Israeli entities

Coverage timeline

HollowGraph malware hijacks Microsoft 365 calendar for covert C2
www.securityweek.com · Jul 21, 2026
Cavern Manticore Uses SysAid Exploit to Target Israeli Firms
www.securityweek.com · Jul 7, 2026
Cavern Manticore hackers breach Israeli government via RMM tools
www.infosecurity-magazine.com · Jul 6, 2026