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.

MITRE ATT&CK coverage

Rules detecting the same action

Other rules on this platform that filter on the same API call or operation.

Rule body yaml

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

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.

FieldKindValues
Operationmatch
  • Disable Strong Authentication.