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Uncommon New Firewall Rule Added In Windows Firewall Exception List

Detects when a rule has been added to the Windows Firewall exception list

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Detection Logic

{
  "selection": {
    "EventID": [
      2004,
      2071,
      2097
    ]
  },
  "filter_main_block": {
    "Action": 2
  },
  "filter_main_generic": {
    "ApplicationPath
| startswith": [
      "C:\\Program Files (x86)\\",
      "C:\\Program Files\\",
      "C:\\Windows\\System32\\",
      "C:\\Windows\\SysWOW64\\",
      "C:\\Windows\\WinSxS\\"
    ]
  },
  "filter_main_covered_paths": {
    "ApplicationPath
| contains": [
      "C:\\PerfLogs\\",
      "C:\\Temp\\",
      "C:\\Tmp\\",
      "C:\\Users\\Public\\",
      "C:\\Windows\\Tasks\\",
      "C:\\Windows\\Temp\\",
      "\\AppData\\Local\\Temp\\"
    ]
  },
  "filter_main_system": {
    "ApplicationPath": "SYSTEM",
    "ModifyingApplication": [
      "C:\\Windows\\System32\\dllhost.exe",
      "C:\\Windows\\System32\\oobe\\Setup.exe",
      "C:\\Windows\\System32\\svchost.exe"
    ]
  },
  "filter_main_ehome": {
    "ApplicationPath
| startswith": "C:\\Windows\\ehome\\",
    "ModifyingApplication": "C:\\Windows\\System32\\oobe\\Setup.exe"
  },
  "filter_main_tiworker": {
    "ModifyingApplication
| startswith": "C:\\Windows\\WinSxS\\",
    "ModifyingApplication
| endswith": "\\TiWorker.exe"
  },
  "filter_main_null": {
    "ApplicationPath": null
  },
  "filter_optional_no_path": {
    "ModifyingApplication": [
      "C:\\Windows\\System32\\svchost.exe",
      "C:\\Windows\\System32\\dllhost.exe"
    ],
    "ApplicationPath": ""
  },
  "filter_optional_msmpeng": [
    {
      "ModifyingApplication
| startswith": [
        "C:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\",
        "C:\\Program Files\\Windows Defender\\"
      ],
      "ModifyingApplication
| endswith": "\\MsMpEng.exe"
    },
    {
      "ApplicationPath
| startswith": [
        "C:\\ProgramData\\Microsoft\\Windows Defender\\Platform\\",
        "C:\\Program Files\\Windows Defender\\"
      ],
      "ApplicationPath
| endswith": "\\MsMpEng.exe"
    }
  ],
  "filter_optional_systemApps": {
    "ApplicationPath
| startswith": "C:\\Windows\\SystemApps\\",
    "ModifyingApplication": "C:\\Windows\\System32\\svchost.exe"
  },
  "condition": "selection and not 1 of filter_main_* and not 1 of filter_optional_*"
}

Field Validations

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