Logon from a Risky IP Address — Sigma Rule

Rule metadata and linked tags

Author: Austin Songer @austinsonger. Source status: test; severity: medium. Source dates: 2021-08-23 / 2022-10-09.

{
  "service": "threat_management",
  "product": "m365"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 8346966c2e98e2e9c86409f1ff7efd0feed33ac6720e7c4605e80797ce178968

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: Logon from a Risky IP Address
id: c191e2fa-f9d6-4ccf-82af-4f2aba08359f
status: test
description: Detects when a Microsoft Cloud App Security reported when a user signs into your sanctioned apps from a risky IP address.
references:
    - https://learn.microsoft.com/en-us/defender-cloud-apps/anomaly-detection-policy
    - https://learn.microsoft.com/en-us/defender-cloud-apps/policy-template-reference
author: Austin Songer @austinsonger
date: 2021-08-23
modified: 2022-10-09
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.initial-access
    - attack.stealth
    - attack.t1078
logsource:
    service: threat_management
    product: m365
detection:
    selection:
        eventSource: SecurityComplianceCenter
        eventName: 'Log on from a risky IP address'
        status: success
    condition: selection
falsepositives:
    - Unknown
level: medium

Original YAML and metadata in JSON

False positives

• Unknown

Source references

• https://learn.microsoft.com/en-us/defender-cloud-apps/anomaly-detection-policy
• https://learn.microsoft.com/en-us/defender-cloud-apps/policy-template-reference