CurrentControlSet Autorun Keys Modification — Sigma Rule

Rule metadata and linked tags

Author: Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split). Source status: test; severity: medium. Source dates: 2019-10-25 / 2023-08-17.

{
  "category": "registry_set",
  "product": "windows"
}

Pinned original Sigma rule · Detection Rule License 1.1

Source SHA-256: d2222a5f5c96e664da89d9c5d32ed25d9d27bf5b79c900b75715066a3093d9e6

Detection logic

Original source YAML. Source-tag agreement is not proof of complete semantic coverage. This rule has not been compiled for a SIEM backend or validated against live telemetry here.

title: CurrentControlSet Autorun Keys Modification
id: f674e36a-4b91-431e-8aef-f8a96c2aca35
related:
    - id: 17f878b8-9968-4578-b814-c4217fc5768c
      type: obsolete
status: test
description: Detects modification of autostart extensibility point (ASEP) in registry.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1547.001/T1547.001.md
    - https://learn.microsoft.com/en-us/sysinternals/downloads/autoruns
    - https://gist.github.com/GlebSukhodolskiy/0fc5fa5f482903064b448890db1eaf9d # a list with registry keys
author: Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split)
date: 2019-10-25
modified: 2023-08-17
tags:
    - attack.privilege-escalation
    - attack.persistence
    - attack.t1547.001
logsource:
    category: registry_set
    product: windows
detection:
    system_control_base:
        TargetObject|contains: '\SYSTEM\CurrentControlSet\Control'
    system_control_keys:
        TargetObject|contains:
            - '\Terminal Server\WinStations\RDP-Tcp\InitialProgram'
            - '\Terminal Server\Wds\rdpwd\StartupPrograms'
            - '\SecurityProviders\SecurityProviders'
            - '\SafeBoot\AlternateShell'
            - '\Print\Providers'
            - '\Print\Monitors'
            - '\NetworkProvider\Order'
            - '\Lsa\Notification Packages'
            - '\Lsa\Authentication Packages'
            - '\BootVerificationProgram\ImagePath'
    filter_empty:
        Details: '(Empty)'
    filter_cutepdf:
        Image: 'C:\Windows\System32\spoolsv.exe'
        TargetObject|contains: '\Print\Monitors\CutePDF Writer Monitor'
        Details:
            - 'cpwmon64_v40.dll'
            - 'CutePDF Writer'
    filter_onenote:
        Image: C:\Windows\System32\spoolsv.exe
        TargetObject|contains: 'Print\Monitors\Appmon\Ports\Microsoft.Office.OneNote_'
        User|contains: # covers many language settings
            - 'AUTHORI'
            - 'AUTORI'
    filter_poqexec:
        Image: 'C:\Windows\System32\poqexec.exe'
        TargetObject|endswith: '\NetworkProvider\Order\ProviderOrder'
    filter_realvnc:
        Image: 'C:\Windows\System32\spoolsv.exe'
        TargetObject|endswith: '\Print\Monitors\MONVNC\Driver'
        Details: 'VNCpm.dll'
    condition: all of system_control_* and not 1 of filter_*
falsepositives:
    - Legitimate software automatically (mostly, during installation) sets up autorun keys for legitimate reason
    - Legitimate administrator sets up autorun keys for legitimate reason
level: medium

Original YAML and metadata in JSON

False positives

• Legitimate software automatically (mostly, during installation) sets up autorun keys for legitimate reason
• Legitimate administrator sets up autorun keys for legitimate reason

Source references

• https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1547.001/T1547.001.md
• https://learn.microsoft.com/en-us/sysinternals/downloads/autoruns
• https://gist.github.com/GlebSukhodolskiy/0fc5fa5f482903064b448890db1eaf9d