title: Brute Force Attack Sequence
id: 2e04b62f-42b6-54f1-8a08-df650f7592eb
custom_id: wf-corr-001
status: stable
type: event_count
rules:
    - wf-auth-001
group-by:
    - clientIP
timespan: 5m
condition:
    gte: 5
description: |
    Correlates multiple authentication failure events from the same source IP
    within a 5-minute window. Five or more failures indicate a likely brute
    force attack requiring investigation and potential IP blocking.
author: WitFoo
date: 2026-02-21
tags:
    - attack.credential_access
    - attack.t1110
level: high
falsepositives:
    - User repeatedly entering wrong password
    - Automated scripts with expired credentials
