Failed Authentications From Countries You Do Not Operate Out Of — Sigma Rule

Rule metadata and linked tags

Author: MikeDuddington, '@dudders1'. Source status: test; severity: low. Source dates: 2022-07-28 / not supplied.

{
  "product": "azure",
  "service": "signinlogs"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: cfcefe220c04124588f43650a5c4ccd7bd45a68adad0c6ba83f53555c0a8daa0

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: Failed Authentications From Countries You Do Not Operate Out Of
id: 28870ae4-6a13-4616-bd1a-235a7fad7458
status: test
description: Detect failed authentications from countries you do not operate out of.
references:
    - https://learn.microsoft.com/en-gb/entra/architecture/security-operations-user-accounts
author: MikeDuddington, '@dudders1'
date: 2022-07-28
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.credential-access
    - attack.stealth
    - attack.t1078.004
    - attack.t1110
logsource:
    product: azure
    service: signinlogs
detection:
    selection:
        Status: 'Success'
    selection1:
        Location|contains: '<Countries you DO operate out of e,g GB, use OR for multiple>'
    condition: not selection and not selection1
falsepositives:
    - If this was approved by System Administrator.
level: low

Original YAML and metadata in JSON

False positives

• If this was approved by System Administrator.

Source references

• https://learn.microsoft.com/en-gb/entra/architecture/security-operations-user-accounts