Potential Persistence Via MyComputer Registry Keys

calendar Dec 1, 2024 · attack.persistence  ·
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Detects modification to the "Default" value of the "MyComputer" key and subkeys to point to a custom binary that will be launched whenever the associated action is executed (see reference section for example)

Sigma rule (View on GitHub)

 1title: Potential Persistence Via MyComputer Registry Keys
 2id: 8fbe98a8-8f9d-44f8-aa71-8c572e29ef06
 3status: test
 4description: Detects modification to the "Default" value of the "MyComputer" key and subkeys to point to a custom binary that will be launched whenever the associated action is executed (see reference section for example)
 5references:
 6    - https://www.hexacorn.com/blog/2017/01/18/beyond-good-ol-run-key-part-55/
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2022-08-09
 9modified: 2024-01-11
10tags:
11    - attack.persistence
12logsource:
13    category: registry_set
14    product: windows
15detection:
16    selection:
17        TargetObject|contains: '\Microsoft\Windows\CurrentVersion\Explorer\MyComputer'
18        TargetObject|endswith: '(Default)'
19    condition: selection
20falsepositives:
21    - Unlikely but if you experience FPs add specific processes and locations you would like to monitor for
22level: high

References

  • Beyond good ol’ Run key, Part 55

    The flexibility offered by the Registry comes with a price. Whoever is in a position to change the Registry keys or its values can affect not only the way OS works, but also adjust the functionalit...


    Read More

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