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

Rule metadata and linked tags

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

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 0a53f3542b01dee6cd1344b45538ce8eff208f918be82e95ade790ee4a03b4dd

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: Successful Authentications From Countries You Do Not Operate Out Of
id: 8c944ecb-6970-4541-8496-be554b8e2846
status: test
description: Detect successful 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'
    filter:
        Location|contains: '<Countries you DO operate out of e,g GB, use OR for multiple>'
    condition: selection and not filter
falsepositives:
    - If this was approved by System Administrator.
level: medium

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