Elastic high stable kql

Entra ID Excessive Account Lockouts Detected

Identifies a high count of failed Microsoft Entra ID sign-in attempts as the result of the target user account being locked out. Adversaries may attempt to brute-force user accounts by repeatedly trying to authenticate with incorrect credentials, leading to account lockouts by Entra ID Smart Lockout policies.

View Source

Detection Logic

data_stream.dataset: "azure.signinlogs" and event.category: "authentication"
    and azure.signinlogs.category: ("NonInteractiveUserSignInLogs" or "SignInLogs")
    and event.outcome: "failure"
    and azure.signinlogs.properties.authentication_requirement: "singleFactorAuthentication"
    and azure.signinlogs.properties.status.error_code: 50053
    and azure.signinlogs.properties.user_principal_name: (* and not "")
    and not source.as.organization.name: "MICROSOFT-CORP-MSN-as-BLOCK"
    and not source.ip: ("10.0.0.0/8" or "172.16.0.0/12" or "192.168.0.0/16" or "127.0.0.0/8" or "::1/128" or "fd00::/8")

False Positives

⚠ Automated processes that attempt to authenticate using expired credentials or have misconfigured authentication settings may lead to false positives.

Field Validations

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