UniFi Site Manager Site Health Critical

// UniFi Site Health Critical Detection
let OfflineThreshold = 3;
Unifi_SiteManager_Sites_CL
| where TimeGenerated > ago(30m)
| summarize arg_max(TimeGenerated, *) by SiteId
| where OfflineDevices >= OfflineThreshold
| extend
    AvailabilityPct = round(100.0 * (TotalDevices - OfflineDevices) / TotalDevices, 1),
    TotalClients = WifiClients + WiredClients
| project
    TimeGenerated,
    SiteId = SiteId,
    SiteName = SiteName,
    TotalDevices = TotalDevices,
    OfflineDevices = OfflineDevices,
    OnlineDevices = TotalDevices - OfflineDevices,
    AvailabilityPct,
    TotalClients,
    WiFiClients = WifiClients,
    WiredClients = WiredClients,
    Timezone = Timezone

subTechniques:
- T1499.002
incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: PT4H
    reopenClosedIncident: true
    matchingMethod: AllEntities
    enabled: true
  createIncident: true
name: 'UniFi Site Manager: Site Health Critical'
triggerOperator: gt
query: |
  // UniFi Site Health Critical Detection
  let OfflineThreshold = 3;
  Unifi_SiteManager_Sites_CL
  | where TimeGenerated > ago(30m)
  | summarize arg_max(TimeGenerated, *) by SiteId
  | where OfflineDevices >= OfflineThreshold
  | extend
      AvailabilityPct = round(100.0 * (TotalDevices - OfflineDevices) / TotalDevices, 1),
      TotalClients = WifiClients + WiredClients
  | project
      TimeGenerated,
      SiteId = SiteId,
      SiteName = SiteName,
      TotalDevices = TotalDevices,
      OfflineDevices = OfflineDevices,
      OnlineDevices = TotalDevices - OfflineDevices,
      AvailabilityPct,
      TotalClients,
      WiFiClients = WifiClients,
      WiredClients = WiredClients,
      Timezone = Timezone
queryFrequency: 15m
description: |
  Identifies when a site has multiple offline devices, indicating significant site-level issues such as a power outage, network failure, or infrastructure problem.
id: c8875ebb-cc6e-14e4-4216-d8b06fd92c90
triggerThreshold: 0
queryPeriod: 30m
version: 1.0.1
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/UniFiCloudSiteHealthCritical.yaml
relevantTechniques:
- T1489
- T1499
tactics:
- Impact
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: SiteId
  - identifier: DnsDomain
    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/c8875ebb-cc6e-14e4-4216-d8b06fd92c90')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/c8875ebb-cc6e-14e4-4216-d8b06fd92c90')]",
      "properties": {
        "alertRuleTemplateName": "c8875ebb-cc6e-14e4-4216-d8b06fd92c90",
        "customDetails": null,
        "description": "Identifies when a site has multiple offline devices, indicating significant site-level issues such as a power outage, network failure, or infrastructure problem.\n",
        "displayName": "UniFi Site Manager: Site Health Critical",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "SiteId",
                "identifier": "HostName"
              },
              {
                "columnName": "SiteName",
                "identifier": "DnsDomain"
              }
            ]
          }
        ],
        "incidentConfiguration": {
          "createIncident": true,
          "groupingConfiguration": {
            "enabled": true,
            "lookbackDuration": "PT4H",
            "matchingMethod": "AllEntities",
            "reopenClosedIncident": true
          }
        },
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/UniFi%20Site%20Manager%20%28CCF%29/Analytic%20Rules/UniFiCloudSiteHealthCritical.yaml",
        "query": "// UniFi Site Health Critical Detection\nlet OfflineThreshold = 3;\nUnifi_SiteManager_Sites_CL\n| where TimeGenerated > ago(30m)\n| summarize arg_max(TimeGenerated, *) by SiteId\n| where OfflineDevices >= OfflineThreshold\n| extend\n    AvailabilityPct = round(100.0 * (TotalDevices - OfflineDevices) / TotalDevices, 1),\n    TotalClients = WifiClients + WiredClients\n| project\n    TimeGenerated,\n    SiteId = SiteId,\n    SiteName = SiteName,\n    TotalDevices = TotalDevices,\n    OfflineDevices = OfflineDevices,\n    OnlineDevices = TotalDevices - OfflineDevices,\n    AvailabilityPct,\n    TotalClients,\n    WiFiClients = WifiClients,\n    WiredClients = WiredClients,\n    Timezone = Timezone\n",
        "queryFrequency": "PT15M",
        "queryPeriod": "PT30M",
        "severity": "High",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1489",
          "T1499"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}