Amsi.DLL Load By Uncommon Process

{
  "image_load": {
    "EventID": 7,
    "Channel": "Microsoft-Windows-Sysmon/Operational"
  },
  "selection": {
    "ImageLoaded
| endswith": "\\amsi.dll"
  },
  "filter_main_exact": {
    "Image
| endswith": [
      ":\\Windows\\explorer.exe",
      ":\\Windows\\Sysmon64.exe",
      ":\\Windows\\Sysmon64a.exe"
    ]
  },
  "filter_main_generic": {
    "Image
| contains": [
      ":\\Program Files (x86)\\",
      ":\\Program Files\\",
      ":\\Windows\\System32\\",
      ":\\Windows\\SysWOW64\\",
      ":\\Windows\\WinSxS\\"
    ]
  },
  "filter_optional_defender": {
    "Image
| contains": ":\\ProgramData\\Microsoft\\Windows Defender\\Platform\\",
    "Image
| endswith": "\\MsMpEng.exe"
  },
  "filter_main_dotnet": {
    "Image
| contains": [
      ":\\Windows\\Microsoft.NET\\Framework\\",
      ":\\Windows\\Microsoft.NET\\Framework64\\",
      ":\\Windows\\Microsoft.NET\\FrameworkArm\\",
      ":\\Windows\\Microsoft.NET\\FrameworkArm64\\"
    ],
    "Image
| endswith": "\\ngentask.exe"
  },
  "filter_main_null": {
    "Image": null
  },
  "filter_main_empty": {
    "Image": ""
  },
  "condition": "image_load and (selection and not 1 of filter_main_* and not 1 of filter_optional_*)"
}

False Positives

• ⚠ Legitimate third party apps installed in "ProgramData" and "AppData" might generate some false positives. Apply additional filters accordingly