Ransomware Detection With Windows Minifilter by Intercepting File Filter and Change Events

Security researcher 0xflux published a proof-of-concept Windows minifilter driver (Sanctum/fs_minifilter) that monitors filesystem I/O to detect ransomware behaviors—rapid file writes, renames to LockBit-like extensions, and high-entropy changes—logging process context and alerting a user-mode engine; the report includes a Rust simulator, implementation details, and suggested enhancements for integration with behavioral EDR solutions.