Detection rules › Sigma
Internet Explorer Autorun Keys Modification
Detects modification of autostart extensibility point (ASEP) in registry.
Known false positives
- Legitimate software automatically (mostly, during installation) sets up autorun keys for legitimate reason
- Legitimate administrator sets up autorun keys for legitimate reason
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Persistence | |
| Privilege Escalation |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 13: RegistryEvent (Value Set) |
Rule body
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
Stages and Predicates
Stage 0: condition
ie and ie_details and not 1 of filter_*Stage 1: ie
ie:
TargetObject|contains:
- '\Software\Wow6432Node\Microsoft\Internet Explorer'
- '\Software\Microsoft\Internet Explorer'
Stage 2: ie_details
ie_details:
TargetObject|contains:
- '\Toolbar'
- '\Extensions'
- '\Explorer Bars'
Stage 3: not filter_*
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'
Exclusions
The rule actively suppresses these predicates.
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
TargetObject | match |
| field:"TargetObject" kind:match |