Increased Failed Authentications Of Any Type

title: Increased Failed Authentications Of Any Type
id: e1d02b53-c03c-4948-b11d-4d00cca49d03
status: test
description: Detects when sign-ins increased by 10% or greater.
references:
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#monitoring-for-failed-unusual-sign-ins
author: Mark Morowczynski '@markmorow', MikeDuddington, '@dudders1'
date: 2022-08-11
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.defense-evasion
    - attack.t1078
logsource:
    product: azure
    service: signinlogs
detection:
    selection:
        Status: failure
        Count: "<10%"
    condition: selection
falsepositives:
    - Unlikely
level: medium