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Detection rules › Sigma

Azure AD Account Credential Leaked

Status
test
Severity
high
Log source
product azure, service riskdetection
Author
Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
Source
github.com/SigmaHQ/sigma

Indicates that the user's valid credentials have been leaked.

MITRE ATT&CK coverage

TacticTechniques
ReconnaissanceT1589 Gather Victim Identity Information

Rule body yaml

title: Azure AD Account Credential Leaked
id: 19128e5e-4743-48dc-bd97-52e5775af817
status: test
description: Indicates that the user's valid credentials have been leaked.
references:
    - https://learn.microsoft.com/en-us/entra/id-protection/concept-identity-protection-risks#leaked-credentials
    - https://learn.microsoft.com/en-us/entra/architecture/security-operations-user-accounts#unusual-sign-ins
author: Mark Morowczynski '@markmorow', Gloria Lee, '@gleeiamglo'
date: 2023-09-03
tags:
    - attack.t1589
    - attack.reconnaissance
logsource:
    product: azure
    service: riskdetection
detection:
    selection:
        riskEventType: 'leakedCredentials'
    condition: selection
falsepositives:
    - A rare hash collision.
level: high

Stages and Predicates

Stage 0: condition

selection

Stage 1: selection

selection:
    riskEventType: 'leakedCredentials'

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
riskEventTypeeq
  • leakedCredentials