42 lines
1002 B
YAML
42 lines
1002 B
YAML
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title: Microsoft Office Add-In Loading
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ruletype: Sigma
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author: NVISO
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date: 2020/05/11
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description: Detects add-ins that load when Microsoft Word or Excel starts (.wll/.xll
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are simply .dll fit for Word or Excel).
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detection:
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SELECTION_1:
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EventID: 11
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SELECTION_2:
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TargetFilename: '*\Microsoft\Word\Startup\\*'
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SELECTION_3:
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TargetFilename: '*.wll'
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SELECTION_4:
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TargetFilename: '*\Microsoft\Excel\Startup\\*'
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SELECTION_5:
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TargetFilename: '*.xll'
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SELECTION_6:
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TargetFilename: '*\Microsoft\Addins\\*'
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SELECTION_7:
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TargetFilename:
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- '*.xlam'
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- '*.xla'
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condition: (SELECTION_1 and (((SELECTION_2 and SELECTION_3) or (SELECTION_4 and
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SELECTION_5)) or (SELECTION_6 and SELECTION_7)))
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falsepositives:
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- Legitimate add-ins
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id: 8e1cb247-6cf6-42fa-b440-3f27d57e9936
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level: high
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logsource:
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category: file_event
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product: windows
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modified: 2021/11/27
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references:
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- Internal Research
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status: test
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tags:
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- attack.persistence
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- attack.t1137
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- attack.t1137.006
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