Azure AD Threat Intelligence — Sigma Rule

Rule metadata and linked tags

Author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'. Source status: test; severity: high. Source dates: 2023-09-07 / not supplied.

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

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: 3bc9dd8324c22df03bc91c3880886ab2851c286b0e8b421f4da51289512fc86f

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: Azure AD Threat Intelligence
id: a2cb56ff-4f46-437a-a0fa-ffa4d1303cba
status: test
description: Indicates user activity that is unusual for the user or consistent with known attack patterns.
references:
    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#azure-ad-threat-intelligence-sign-in
    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#azure-ad-threat-intelligence-user
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-07
tags:
    - attack.stealth
    - attack.t1078
    - attack.persistence
    - attack.privilege-escalation
    - attack.initial-access
logsource:
    product: azure
    service: riskdetection
detection:
    selection:
        riskEventType: 'investigationsThreatIntelligence'
    condition: selection
falsepositives:
    - We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.
level: high

Original YAML and metadata in JSON

False positives

• We recommend investigating the sessions flagged by this detection in the context of other sign-ins from the user.

Source references

• https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#azure-ad-threat-intelligence-sign-in
• https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#azure-ad-threat-intelligence-user
• https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins