Increased Failed Authentications Of Any Type

Title: Increased Failed Authentications Of Any Type
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
modified:None
Tags:

• -'attack.privilege-escalation'
• -'attack.persistence'
• -'attack.initial-access'
• -'attack.stealth'
• -'attack.t1078'

Logsource:

• product: azure
• service: signinlogs

Detection:
  selection:
    Status: 'failure'
    Count: '<10%'
  condition:selection
Falsepositives:
  -Unlikely
Level: medium