UniFi Site Manager External WAN IP changed

Unifi_SiteManager_Sites_CL
      | where TimeGenerated > ago(1h)
      | extend SiteName = tostring(Meta.name),
               currentIp = tostring(SiteStatistics.wans.WAN.externalIp)
      | where isnotempty(currentIp)
      | summarize DistinctIps = make_set(currentIp), arg_max(TimeGenerated, currentIp) by SiteId, SiteName
      | where array_length(DistinctIps) > 1
      | extend Activity = strcat('WAN IP changed; observed: ', tostring(DistinctIps))
      | project TimeGenerated, SiteId, SiteName, Activity, CurrentIp = currentIp, ObservedIps = DistinctIps

subTechniques:
- T1590.005
incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: PT5H
    reopenClosedIncident: false
    matchingMethod: AllEntities
    enabled: true
  createIncident: true
name: 'UniFi Site Manager: External WAN IP changed'
triggerOperator: gt
query: |
  Unifi_SiteManager_Sites_CL
        | where TimeGenerated > ago(1h)
        | extend SiteName = tostring(Meta.name),
                 currentIp = tostring(SiteStatistics.wans.WAN.externalIp)
        | where isnotempty(currentIp)
        | summarize DistinctIps = make_set(currentIp), arg_max(TimeGenerated, currentIp) by SiteId, SiteName
        | where array_length(DistinctIps) > 1
        | extend Activity = strcat('WAN IP changed; observed: ', tostring(DistinctIps))
        | project TimeGenerated, SiteId, SiteName, Activity, CurrentIp = currentIp, ObservedIps = DistinctIps
queryFrequency: 1h
description: |
  Identifies when a site reports more than one distinct WAN external IP within an hour, which may indicate ISP DHCP refresh, WAN reconfiguration, or routing hijack.
id: ef1a293a-9e2b-b087-7816-2610814ed2d4
triggerThreshold: 0
queryPeriod: 1h
version: 1.0.0
kind: Scheduled
status: Available
severity: High
requiredDataConnectors:
- connectorId: UniFiSiteManagerConnectorDefinition
  dataTypes:
  - Unifi_SiteManager_Sites_CL
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/UniFi%20Site%20Manager%20%28CCF%29/Analytic%20Rules/UniFiCloudExternalWANIPchanged.yaml
relevantTechniques:
- T1590
tactics:
- Reconnaissance
entityMappings:
- fieldMappings:
  - identifier: Address
    columnName: CurrentIp
  entityType: IP
- fieldMappings:
  - identifier: HostName
    columnName: SiteName
  entityType: Host

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2024-01-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/ef1a293a-9e2b-b087-7816-2610814ed2d4')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/ef1a293a-9e2b-b087-7816-2610814ed2d4')]",
      "properties": {
        "alertRuleTemplateName": "ef1a293a-9e2b-b087-7816-2610814ed2d4",
        "customDetails": null,
        "description": "Identifies when a site reports more than one distinct WAN external IP within an hour, which may indicate ISP DHCP refresh, WAN reconfiguration, or routing hijack.\n",
        "displayName": "UniFi Site Manager: External WAN IP changed",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "CurrentIp",
                "identifier": "Address"
              }
            ]
          },
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "SiteName",
                "identifier": "HostName"
              }
            ]
          }
        ],
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "lookbackDuration": "PT5H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": false
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/UniFi%20Site%20Manager%20%28CCF%29/Analytic%20Rules/UniFiCloudExternalWANIPchanged.yaml",
        "query": "Unifi_SiteManager_Sites_CL\n      | where TimeGenerated > ago(1h)\n      | extend SiteName = tostring(Meta.name),\n               currentIp = tostring(SiteStatistics.wans.WAN.externalIp)\n      | where isnotempty(currentIp)\n      | summarize DistinctIps = make_set(currentIp), arg_max(TimeGenerated, currentIp) by SiteId, SiteName\n      | where array_length(DistinctIps) > 1\n      | extend Activity = strcat('WAN IP changed; observed: ', tostring(DistinctIps))\n      | project TimeGenerated, SiteId, SiteName, Activity, CurrentIp = currentIp, ObservedIps = DistinctIps\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Reconnaissance"
        ],
        "techniques": [
          "T1590"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}