Unmanaged device sign-in to Office Home followed by Graph API expansion
Detects sign-ins to Office Home or Office365 applications from unmanaged or unknown devices, followed by an unusual amount or variety of activity within SharePoint Online or OneDrive for Business within a two-hour window. This behavior is indicative of potential unauthorized access or account compromise where an actor is using a non-corporate device to interact with sensitive cloud documents.
Microsoft Sentinel (KQL)
