Python Function Execution Security Warning Disabled In Excel

calendar Sep 2, 2024 · attack.defense-evasion attack.t1562.001  ·
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Detects changes to the registry value "PythonFunctionWarnings" that would prevent any warnings or alerts from showing when Python functions are about to be executed. Threat actors could run malicious code through the new Microsoft Excel feature that allows Python to run within the spreadsheet.

Sigma rule (View on GitHub)

 1title: Python Function Execution Security Warning Disabled In Excel
 2id: 023c654f-8f16-44d9-bb2b-00ff36a62af9
 3related:
 4    - id: 17e53739-a1fc-4a62-b1b9-87711c2d5e44
 5      type: similar
 6status: test
 7description: |
 8    Detects changes to the registry value "PythonFunctionWarnings" that would prevent any warnings or alerts from showing when Python functions are about to be executed.
 9    Threat actors could run malicious code through the new Microsoft Excel feature that allows Python to run within the spreadsheet.    
10references:
11    - https://support.microsoft.com/en-us/office/data-security-and-python-in-excel-33cc88a4-4a87-485e-9ff9-f35958278327
12author: '@Kostastsale'
13date: 2023-08-22
14tags:
15    - attack.defense-evasion
16    - attack.t1562.001
17logsource:
18    category: process_creation
19    product: windows
20detection:
21    selection:
22        CommandLine|contains|all:
23            - '\Microsoft\Office\'
24            - '\Excel\Security'
25            - 'PythonFunctionWarnings'
26        CommandLine|contains: ' 0'
27    condition: selection
28falsepositives:
29    - Unknown
30level: high

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