title: Logon Scripts (UserInitMprLogonScript)
author: Tom Ueltschi (@c_APT_ure)
date: 2019/01/12
description: Detects creation or execution of UserInitMprLogonScript persistence method
detection:
    SELECTION_1:
        EventID: 1
    SELECTION_2:
        EventID: 1
    SELECTION_3:
        ParentImage: '*\userinit.exe'
    SELECTION_4:
        Image: '*\explorer.exe'
    SELECTION_5:
        CommandLine: '*netlogon.bat*'
    SELECTION_6:
        CommandLine: '*UsrLogon.cmd*'
    SELECTION_7:
        CommandLine: '*UserInitMprLogonScript*'
    condition: (SELECTION_1 and ((SELECTION_2 and (SELECTION_3 and  not (SELECTION_4))
        and  not ((SELECTION_5 or SELECTION_6))) or SELECTION_7))
falsepositives:
- exclude legitimate logon scripts
- penetration tests, red teaming
id: 0a98a10c-685d-4ab0-bddc-b6bdd1d48458
level: high
logsource:
    category: process_creation
    product: windows
modified: 2020/08/26
references:
- https://attack.mitre.org/techniques/T1037/
status: experimental
tags:
- attack.t1037
- attack.t1037.001
- attack.persistence
yml_filename: sysmon_logon_scripts_userinitmprlogonscript_proc.yml
yml_path: /Users/user/Documents/YamatoSecurity/sigma/rules/windows/process_creation