Cavern Manticore: Exposing Iran-linked modular C2 framework

Since early 2026, Check Point Research (CPR) has tracked a new modular command-and-control framework used by Cavern Manticore, an Iran-nexus APT group primarily targeting Israeli organizations, with a focus on IT providers, and government sectors. Cavern Manticore is an Iran MOIS (Ministry of Intelligence and Security)-linked actor, with links to the OilRig subgroup named Lyceum.

The framework reflects a mature and adaptable toolset built around a shared .NET foundation, while using multiple compilation formats across different components, including .NET Framework, .NET Mixed-Mode C++/CLI, and .NET Native AOT. The compilation format itself becomes the anti-analysis layer that forces reverse engineers into multiple toolsets and metadata-reconstruction workflows.

During our investigation, we observed both Cavern agents and Cavern modules in the wild, highlighting a modular architecture that separates core communication capabilities from mission-specific post-exploitation functionality. This design allows the operators to tailor deployments per victim environment, limit what defenders and analysts can recover from any single victim and extend access after compromise through specialized modules for reconnaissance, data access, tunneling, and lateral movement.

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