MFA Push Fatigue: Repeated Prompts Followed by Approval
This rule detects potential MFA fatigue attacks (Push Bombing) by monitoring sign-in logs for a high volume of authentication prompts directed at a single user within a one-hour window. It specifically identifies patterns where a user receives multiple denied MFA push requests followed by at least one successful approval. The rule also accounts for suspicious behavior such as requests originating from multiple IP addresses or geographic locations.
Microsoft Sentinel (KQL)
