title: Multiple Users Attempting To Authenticate Using Explicit Credentials
id: 196a29c2-e378-48d8-ba07-8a9e61f7fab9
description: Detects a source user failing to authenticate with multiple users using explicit credentials on a host.
author: Mauricio Velazco
date: 2021/06/01
modified: 2021/08/09
references:
    - https://docs.splunk.com/Documentation/ESSOC/3.22.0/stories/UseCase#Active_directory_password_spraying
tags:
    - attack.t1110.003
    - attack.initial_access
    - attack.privilege_escalation
logsource:
    product: windows
    service: security
detection:
    selection1:
        EventID: 4648
    timeframe: 24h
    condition:
        - selection1 | count(Account_Name) by ComputerName > 10
falsepositives:
    - Terminal servers
    - Jump servers
    - Other multiuser systems like Citrix server farms
    - Workstations with frequently changing users
level: medium