Detection rules › Sigma
Azure AD Only Single Factor Authentication Required
Detect when users are authenticating without MFA being required.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Initial Access | T1078.004 Valid Accounts: Cloud Accounts |
| Persistence | T1078.004 Valid Accounts: Cloud Accounts, T1556.006 Modify Authentication Process: Multi-Factor Authentication |
| Privilege Escalation | T1078.004 Valid Accounts: Cloud Accounts |
| Stealth | T1078.004 Valid Accounts: Cloud Accounts |
| Defense Impairment | T1556.006 Modify Authentication Process: Multi-Factor Authentication |
| Credential Access | T1556.006 Modify Authentication Process: Multi-Factor Authentication |
Rule body yaml
title: Azure AD Only Single Factor Authentication Required
id: 28eea407-28d7-4e42-b0be-575d5ba60b2c
status: test
description: Detect when users are authenticating without MFA being required.
references:
- https://learn.microsoft.com/en-gb/entra/architecture/security-operations-user-accounts
author: MikeDuddington, '@dudders1'
date: 2022-07-27
tags:
- attack.privilege-escalation
- attack.persistence
- attack.initial-access
- attack.credential-access
- attack.stealth
- attack.defense-impairment
- attack.t1078.004
- attack.t1556.006
logsource:
product: azure
service: signinlogs
detection:
selection:
Status: 'Success'
AuthenticationRequirement: 'singleFactorAuthentication'
condition: selection
falsepositives:
- If this was approved by System Administrator.
level: low
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
Status: 'Success'
AuthenticationRequirement: 'singleFactorAuthentication'
Indicators
Each row is a field, operator, and value that the rule matches. The corpus column counts how many other rules in the catalog look for the same combination: high numbers point to widely-used, community-vetted indicators. Blank or 1 shows that the indicator is specific to this rule.
| Field | Kind | Values |
|---|---|---|
AuthenticationRequirement | eq |
|
Status | eq |
|