title: Brute Force Indicator
id: 8aab7806-a54b-59a6-9a1b-9970f42ec97d
custom_id: wf-auth-002
status: stable
level: high
description: |
    Detects high-severity authentication failures that may indicate active
    brute force attempts. These single-event indicators are enriched by
    WitFoo's lead rule engine to flag repeated failures.
author: WitFoo
date: 2026-02-21
tags:
    - attack.credential_access
    - attack.t1110.001
references:
    - https://attack.mitre.org/techniques/T1110/001/
logsource:
    product: witfoo
    service: artifact-exporter
detection:
    selection:
        messageType: "auth_failure"
        severityLabel:
            - "high"
            - "critical"
    condition: selection
fields:
    - clientIP
    - serverIP
    - userName
    - application
    - severityCode
    - matchedLeadRules
falsepositives:
    - Account lockout events from legitimate users
    - Automated testing systems with expired credentials
