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33 lines
874 B
YAML
33 lines
874 B
YAML
title: Microsoft Office Add-In Loading
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id: 8e1cb247-6cf6-42fa-b440-3f27d57e9936
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status: experimental
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description: Detects add-ins that load when Microsoft Word or Excel starts (.wll/.xll are simply .dll fit for Word or Excel).
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references:
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- Internal research
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tags:
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- attack.persistence
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- attack.t1137
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author: NVISO
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date: 2020/05/11
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logsource:
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product: windows
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service: sysmon
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detection:
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selection:
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EventID: 11 #FileCreate
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wlldropped:
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TargetFilename|contains: \Microsoft\Word\Startup\
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TargetFilename|endswith: .wll
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xlldropped:
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TargetFilename|contains: \Microsoft\Excel\Startup\
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TargetFilename|endswith: .xll
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generic:
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TargetFilename|contains: \Microsoft\Addins\
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TargetFilename|endswith:
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- .xlam
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- .xla
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condition: selection and (wlldropped or xlldropped or generic)
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falsepositives:
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- Legitimate add-ins
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level: high
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