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Detection rules › Sigma

Disabling Multi Factor Authentication

Status
test
Severity
high
Log source
product m365, service audit
Author
Splunk Threat Research Team (original rule), Harjot Singh @cyb3rjy0t (sigma rule)
Source
github.com/SigmaHQ/sigma

Detects disabling of Multi Factor Authentication.

Known false positives

  • Unlikely

MITRE ATT&CK coverage

TacticTechniques
Persistence
Defense Impairment
Credential Access

Telemetry coverage

PlatformRecord / event type
Microsoft 365Disable Strong Authentication.

Rules detecting the same action

These rules filter on the same operation.

Rule body

title: Disabling Multi Factor Authentication
id: 60de9b57-dc4d-48b9-a6a0-b39e0469f876
status: test
description: Detects disabling of Multi Factor Authentication.
references:
    - https://research.splunk.com/cloud/c783dd98-c703-4252-9e8a-f19d9f5c949e/
author: Splunk Threat Research Team (original rule), Harjot Singh @cyb3rjy0t (sigma rule)
date: 2023-09-18
tags:
    - attack.persistence
    - attack.credential-access
    - attack.defense-impairment
    - attack.t1556.006
logsource:
    service: audit
    product: m365
detection:
    selection:
        Operation|contains: 'Disable Strong Authentication.'
    condition: selection
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    Operation|contains: 'Disable Strong Authentication.'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
Operationmatch
  • Disable Strong Authentication.
field:"Operation" kind:match value:"Disable Strong Authentication."