Wow6432Node Classes Autorun Keys Modification

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

Sigma rule (View on GitHub)

 1title: Wow6432Node Classes Autorun Keys Modification
 2id: 18f2065c-d36c-464a-a748-bcf909acb2e3
 3related:
 4    - id: 17f878b8-9968-4578-b814-c4217fc5768c
 5      type: obsoletes
 6status: test
 7description: Detects modification of autostart extensibility point (ASEP) in registry.
 8references:
 9    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1547.001/T1547.001.md
10    - https://learn.microsoft.com/en-us/sysinternals/downloads/autoruns
11    - https://gist.github.com/GlebSukhodolskiy/0fc5fa5f482903064b448890db1eaf9d # a list with registry keys
12author: Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split)
13date: 2019/10/25
14modified: 2023/08/17
15tags:
16    - attack.persistence
17    - attack.t1547.001
18logsource:
19    category: registry_set
20    product: windows
21detection:
22    wow_classes_base:
23        TargetObject|contains: '\Software\Wow6432Node\Classes'
24    wow_classes:
25        TargetObject|contains:
26            - '\Folder\ShellEx\ExtShellFolderViews'
27            - '\Folder\ShellEx\DragDropHandlers'
28            - '\Folder\ShellEx\ColumnHandlers'
29            - '\Directory\Shellex\DragDropHandlers'
30            - '\Directory\Shellex\CopyHookHandlers'
31            - '\CLSID\{AC757296-3522-4E11-9862-C17BE5A1767E}\Instance'
32            - '\CLSID\{ABE3B9A4-257D-4B97-BD1A-294AF496222E}\Instance'
33            - '\CLSID\{7ED96837-96F0-4812-B211-F13C24117ED3}\Instance'
34            - '\CLSID\{083863F1-70DE-11d0-BD40-00A0C911CE86}\Instance'
35            - '\AllFileSystemObjects\ShellEx\DragDropHandlers'
36            - '\ShellEx\PropertySheetHandlers'
37            - '\ShellEx\ContextMenuHandlers'
38    filter:
39        Details: '(Empty)'
40    condition: wow_classes_base and wow_classes and not filter
41fields:
42    - SecurityID
43    - ObjectName
44    - OldValueType
45    - NewValueType
46falsepositives:
47    - Legitimate software automatically (mostly, during installation) sets up autorun keys for legitimate reason
48    - Legitimate administrator sets up autorun keys for legitimate reason
49level: medium

References

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