This query outputs a table that indicates the time difference between Rights granted and Rights revoked. Modify the maxspan time within the transaction function to meet your environments needs. Regex is used here, and is part of the query. Windows 2008 and newer: sourcetype=WinEventLog:Security (EventCode=4717 OR EventCode=4718) | rex “Access\sGranted:\s+Access\sRight:\s+(?\w+)”| rex “Access\sRemoved:\s+Access\sRight:\s+(?\w+)”| eval Rights=coalesce(RightGranted,RightRemoved) | […]