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Microsoft Excel Add-In Loaded

Detects Microsoft Excel loading an Add-In (.xll) file

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Detection Logic

{
  "image_load": {
    "EventID": 7,
    "Channel": "Microsoft-Windows-Sysmon/Operational"
  },
  "selection": {
    "Image
| endswith": "\\excel.exe",
    "ImageLoaded
| endswith": ".xll"
  },
  "condition": "image_load and selection"
}

False Positives

  • ⚠ The rules is only looking for ".xll" loads. So some false positives are expected with legitimate and allowed XLLs

Field Validations

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