UniFi Site Manager New critical notifications appeared

let prev = Unifi_SiteManager_Sites_CL
    | where TimeGenerated between (ago(30m) .. ago(15m))
    | summarize arg_max(TimeGenerated, *) by tostring(SiteId)
    | project siteId_s = tostring(SiteId), prevCritical = CriticalNotifications;
Unifi_SiteManager_Sites_CL
| where TimeGenerated > ago(15m)
| summarize arg_max(TimeGenerated, *) by tostring(SiteId)
| extend siteId_s = tostring(SiteId), CriticalCount = CriticalNotifications
| join kind=inner prev on siteId_s
| where CriticalCount > prevCritical
| extend NewCriticals = CriticalCount - prevCritical
| extend Activity = strcat(NewCriticals, ' new critical notification(s) - count went ', prevCritical, ' -> ', CriticalCount)
| project TimeGenerated, SiteId, SiteName, Activity, prevCritical, CriticalCount, NewCriticals

subTechniques:
- T1499.002
incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: PT5H
    reopenClosedIncident: false
    matchingMethod: AllEntities
    enabled: true
  createIncident: true
name: 'UniFi Site Manager: New critical notifications appeared'
triggerOperator: gt
query: |
  let prev = Unifi_SiteManager_Sites_CL
      | where TimeGenerated between (ago(30m) .. ago(15m))
      | summarize arg_max(TimeGenerated, *) by tostring(SiteId)
      | project siteId_s = tostring(SiteId), prevCritical = CriticalNotifications;
  Unifi_SiteManager_Sites_CL
  | where TimeGenerated > ago(15m)
  | summarize arg_max(TimeGenerated, *) by tostring(SiteId)
  | extend siteId_s = tostring(SiteId), CriticalCount = CriticalNotifications
  | join kind=inner prev on siteId_s
  | where CriticalCount > prevCritical
  | extend NewCriticals = CriticalCount - prevCritical
  | extend Activity = strcat(NewCriticals, ' new critical notification(s) - count went ', prevCritical, ' -> ', CriticalCount)
  | project TimeGenerated, SiteId, SiteName, Activity, prevCritical, CriticalCount, NewCriticals
queryFrequency: 15m
description: |
  Identifies when the UniFi critical-notification count increases since the previous poll, signaling at least one new critical-severity alarm has appeared.
id: e4b75722-7239-f247-558f-d2e851ea0b38
triggerThreshold: 0
queryPeriod: 45m
version: 1.0.1
kind: Scheduled
status: Available
severity: Medium
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/UniFiCloudNewcriticalnotificationsappeared.yaml
relevantTechniques:
- 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/e4b75722-7239-f247-558f-d2e851ea0b38')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/e4b75722-7239-f247-558f-d2e851ea0b38')]",
      "properties": {
        "alertRuleTemplateName": "e4b75722-7239-f247-558f-d2e851ea0b38",
        "customDetails": null,
        "description": "Identifies when the UniFi critical-notification count increases since the previous poll, signaling at least one new critical-severity alarm has appeared.\n",
        "displayName": "UniFi Site Manager: New critical notifications appeared",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "SiteId",
                "identifier": "HostName"
              },
              {
                "columnName": "SiteName",
                "identifier": "DnsDomain"
              }
            ]
          }
        ],
        "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/UniFiCloudNewcriticalnotificationsappeared.yaml",
        "query": "let prev = Unifi_SiteManager_Sites_CL\n    | where TimeGenerated between (ago(30m) .. ago(15m))\n    | summarize arg_max(TimeGenerated, *) by tostring(SiteId)\n    | project siteId_s = tostring(SiteId), prevCritical = CriticalNotifications;\nUnifi_SiteManager_Sites_CL\n| where TimeGenerated > ago(15m)\n| summarize arg_max(TimeGenerated, *) by tostring(SiteId)\n| extend siteId_s = tostring(SiteId), CriticalCount = CriticalNotifications\n| join kind=inner prev on siteId_s\n| where CriticalCount > prevCritical\n| extend NewCriticals = CriticalCount - prevCritical\n| extend Activity = strcat(NewCriticals, ' new critical notification(s) - count went ', prevCritical, ' -> ', CriticalCount)\n| project TimeGenerated, SiteId, SiteName, Activity, prevCritical, CriticalCount, NewCriticals\n",
        "queryFrequency": "PT15M",
        "queryPeriod": "PT45M",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1499"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}