Detection rules › Sigma
Python Function Execution Security Warning Disabled In Excel
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.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Defense Impairment |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| Sysmon | Event ID 1: Process creation |
| Security-Auditing | Event ID 4688: A new process has been created. |
Rule body
title: Python Function Execution Security Warning Disabled In Excel
id: 023c654f-8f16-44d9-bb2b-00ff36a62af9
related:
- id: 17e53739-a1fc-4a62-b1b9-87711c2d5e44
type: similar
status: test
description: |
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.
references:
- https://support.microsoft.com/en-us/office/data-security-and-python-in-excel-33cc88a4-4a87-485e-9ff9-f35958278327
author: '@Kostastsale'
date: 2023-08-22
tags:
- attack.defense-impairment
- attack.t1685
logsource:
category: process_creation
product: windows
detection:
selection:
CommandLine|contains|all:
- '\Microsoft\Office\'
- '\Excel\Security'
- 'PythonFunctionWarnings'
CommandLine|contains: ' 0'
condition: selection
falsepositives:
- Unknown
level: high
Stages and Predicates
Stage 0: condition
selectionStage 1: selection
selection:
CommandLine|contains|all:
- '\Microsoft\Office\'
- '\Excel\Security'
- 'PythonFunctionWarnings'
CommandLine|contains: ' 0'
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
CommandLine | match |
| field:"CommandLine" kind:match |