It is possible that a disabled user account is compromised and another account on the same IP is used to perform operations that are not typical for that user. The query filters the SigninLogs for entries where ResultType is indicates a disabled account and the TimeGenerated is within a defined time range. It then summarizes these entries by IPAddress and AppId, calculating various statistics such as number of login attempts, distinct UPNs, App IDs etc and joins these results with another set of results from SigninLogs, filtering for entries with less than normal number of successful sign-ins. It then filters out entries where there were no successful sign-ins or where successful sign-ins did not occur within the same lookback period as the failed sign-ins, later projecting relevant fields by the count of login attempts, and expands the set of successful sign-ins into individual events. Finally, it joins these results with entries from OfficeActivity where certain operations deemed rare and high risk have been performed, ensuring their occurrance within a certain time range of the successful sign-ins.

0 exclusive techniques.This is coverage no other published rule has; it is not this rule's total technique count.