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Increased Failed Authentications Of Any Type

Detects when sign-ins increased by 10% or greater.

MITRE ATT&CK

privilege-escalationpersistenceinitial-accessdefense-evasion

Detection Query

selection:
  Status: failure
  Count: <10%
condition: selection

Author

Mark Morowczynski '@markmorow', MikeDuddington, '@dudders1'

Created

2022-08-11

Data Sources

azuresigninlogs

Platforms

azure

References

https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#monitoring-for-failed-unusual-sign-ins

Tags

attack.privilege-escalationattack.persistenceattack.initial-accessattack.defense-evasionattack.t1078

Raw Content

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