sigmamediumHunting

Internet Explorer Autorun Keys Modification

Detects modification of autostart extensibility point (ASEP) in registry.

MITRE ATT&CK

privilege-escalationpersistence

Detection Query

ie:
  TargetObject|contains:
    - \Software\Wow6432Node\Microsoft\Internet Explorer
    - \Software\Microsoft\Internet Explorer
ie_details:
  TargetObject|contains:
    - \Toolbar
    - \Extensions
    - \Explorer Bars
filter_empty:
  Details: (Empty)
filter_extensions:
  TargetObject|contains:
    - \Extensions\{2670000A-7350-4f3c-8081-5663EE0C6C49}
    - \Extensions\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}
    - \Extensions\{789FE86F-6FC4-46A1-9849-EDE0DB0C95CA}
    - \Extensions\{A95fe080-8f5d-11d2-a20b-00aa003c157a}
filter_toolbar:
  TargetObject|endswith:
    - \Toolbar\ShellBrowser\ITBar7Layout
    - \Toolbar\ShowDiscussionButton
    - \Toolbar\Locked
condition: ie and ie_details and not 1 of filter_*

Author

Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split)

Created

2019-10-25

Data Sources

windowsRegistry Set Events

Platforms

windows

References

Tags

attack.privilege-escalationattack.persistenceattack.t1547.001

Raw Content

title: Internet Explorer Autorun Keys Modification
id: a80f662f-022f-4429-9b8c-b1a41aaa6688
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:
    ie:
        TargetObject|contains:
            - '\Software\Wow6432Node\Microsoft\Internet Explorer'
            - '\Software\Microsoft\Internet Explorer'
    ie_details:
        TargetObject|contains:
            - '\Toolbar'
            - '\Extensions'
            - '\Explorer Bars'
    filter_empty:
        Details: '(Empty)'
    filter_extensions:
        TargetObject|contains:
            - '\Extensions\{2670000A-7350-4f3c-8081-5663EE0C6C49}'
            - '\Extensions\{31D09BA0-12F5-4CCE-BE8A-2923E76605DA}'
            - '\Extensions\{789FE86F-6FC4-46A1-9849-EDE0DB0C95CA}'
            - '\Extensions\{A95fe080-8f5d-11d2-a20b-00aa003c157a}'
    filter_toolbar:
        TargetObject|endswith:
            - '\Toolbar\ShellBrowser\ITBar7Layout'
            - '\Toolbar\ShowDiscussionButton'
            - '\Toolbar\Locked'
    condition: ie and ie_details 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