Remote Scheduled Task Reconnaissance via ITaskSchedulerService RPC

SigmaHQ Detections@sigmaHQ

•updated Jun 4, 2025•0•18

This rule detects remote RPC calls made to query information about scheduled tasks. Specifically, it monitors for RPC Firewall events (EventID 3) with a specific InterfaceUuid (86d35949-83c9-4044-b424-db363231fd0c) which corresponds to the ITaskSchedulerService. The rule filters out common operational numbers (OpNum 1, 3, 4, 10, 11, 12, 13, 14, 15) to reduce false positives, focusing on less common or potentially malicious reconnaissance activities related to scheduled tasks.