Windows Driver Handle Monitoring for BYOVD Attack Detection

The patent introduces a user mode hook as an intermediary component that sits between the process and the device handle opening operation. This hook intercepts device handle openings, parses object paths to identify device names, and compares them against monitored device names associated with vulnerable drivers. By using this intermediary layer, the system achieves precise detection of BYOVD attacks without requiring deep modifications to the core operating system, thus improving detection capability while managing system complexity.

The patent implements local quality by focusing monitoring efforts specifically on device handle openings related to vulnerable drivers rather than all device handles. The system maintains a list of monitored device names associated with known vulnerable drivers and only performs detailed parsing and comparison for device handles that match these monitored names. This selective monitoring approach ensures comprehensive detection coverage for vulnerable drivers while minimizing processing overhead by avoiding unnecessary monitoring of unrelated device handles.

The patent applies preliminary action by pre-computing and storing a list of monitored device names associated with vulnerable drivers before runtime monitoring begins. This preliminary preparation allows the system to quickly compare device handles against the pre-prepared list during runtime, enabling fast security response without requiring complex real-time analysis that could lead to false positives. The pre-computed monitoring list acts as a reference that speeds up detection while maintaining reliability through accurate matching.