Cisco WSA - Internet access from public IP

let ip_except = dynamic(['127.0.0.2']);    //Add exceptions to this list
CiscoWSAEvent
| where ipv4_is_private(SrcIpAddr) == false
| extend IPCustomEntity = SrcIpAddr

kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAPublicIPSource.yaml
severity: Medium
name: Cisco WSA - Internet access from public IP
entityMappings:
- entityType: IP
  fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
relevantTechniques:
- T1189
queryFrequency: 1h
triggerThreshold: 0
queryPeriod: 1h
description: |
    'Detects internet access from public IP.'
id: 4250b050-e1c6-4926-af04-9484bbd7e94f
version: 1.0.0
tactics:
- InitialAccess
query: |
  let ip_except = dynamic(['127.0.0.2']);    //Add exceptions to this list
  CiscoWSAEvent
  | where ipv4_is_private(SrcIpAddr) == false
  | extend IPCustomEntity = SrcIpAddr  
status: Available
requiredDataConnectors:
- dataTypes:
  - CiscoWSAEvent
  connectorId: CiscoWSA
triggerOperator: gt

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/4250b050-e1c6-4926-af04-9484bbd7e94f')]",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4250b050-e1c6-4926-af04-9484bbd7e94f')]",
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
      "kind": "Scheduled",
      "apiVersion": "2022-11-01-preview",
      "properties": {
        "displayName": "Cisco WSA - Internet access from public IP",
        "description": "'Detects internet access from public IP.'\n",
        "severity": "Medium",
        "enabled": true,
        "query": "let ip_except = dynamic(['127.0.0.2']);    //Add exceptions to this list\nCiscoWSAEvent\n| where ipv4_is_private(SrcIpAddr) == false\n| extend IPCustomEntity = SrcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0,
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "InitialAccess"
        ],
        "techniques": [
          "T1189"
        ],
        "alertRuleTemplateName": "4250b050-e1c6-4926-af04-9484bbd7e94f",
        "customDetails": null,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "identifier": "Address",
                "columnName": "IPCustomEntity"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/CiscoWSA/Analytic Rules/CiscoWSAPublicIPSource.yaml",
        "status": "Available",
        "templateVersion": "1.0.0"
      }
    }
  ]
}