Suspicious Dropping Of Password Filter DLL (via process_creation)

title: Suspicious Dropping Of Password Filter DLL (via process_creation)
id: da9fbe88-2983-5a3b-b0d8-a2b00d7ccda8
status: stable
description: This rule detects dropping of dll files in system32 that may be used to retrieve user credentials from LSASS
references:
    - https://attack.mitre.org/techniques/T1556/002/
    - https://pentestlab.blog/2020/02/10/credential-access-password-filter-dll/
    - https://github.com/3gstudent/PasswordFilter/tree/master/PasswordFilter
author: Huntrule Team
date: 2026-02-05
tags:
    - attack.persistence
    - attack.credential-access
    - attack.defense-impairment
    - attack.t1556.002
logsource:
    category: process_creation
    product: windows
detection:
    selection_cmdline:
        CommandLine|contains|all:
            - 'HKLM\SYSTEM\CurrentControlSet\Control\Lsa'
            - 'scecli\0*'
            - 'reg add'
    condition: selection_cmdline
falsepositives:
    - Unknown
level: medium