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UniFi Site Manager New WAN issue index recorded

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Id17d09e1b-8a3f-776b-6981-dbe2cc74d097
RulenameUniFi Site Manager: New WAN issue index recorded
DescriptionIdentifies a newly-recorded UniFi WAN issue index. May indicate ISP problems, hardware fault, or active denial-of-service pressure on the gateway.
SeverityMedium
TacticsImpact
TechniquesT1498
Required data connectorsUniFiSiteManagerConnectorDefinition
KindScheduled
Query frequency15m
Query period45m
Trigger threshold0
Trigger operatorgt
Source Urihttps://github.com/Azure/Azure-Sentinel/blob/master/Solutions/UniFi%20Site%20Manager%20%28CCF%29/Analytic%20Rules/UniFiCloudNewWANissueindexrecorded.yaml
Version1.0.1
Arm template17d09e1b-8a3f-776b-6981-dbe2cc74d097.json
Deploy To Azure
// UniFi reports a monotonically-rising wanIssues.count rather than discrete events.
// Detect a NEW occurrence by checking whether the per-site max(count) has grown
// in the most recent 15-min window vs the prior 15-min window.
Unifi_SiteManager_Sites_CL
| where TimeGenerated > ago(45m)
| extend siteId_s = tostring(SiteId)
| where isnotempty(tostring(SiteStatistics.wans.WAN))
| mv-expand issue = todynamic(tostring(SiteStatistics.wans.WAN.wanIssues))
| extend issueCount = tolong(issue.count), idx = tolong(issue.index)
| summarize
    PrevMaxCount = maxif(issueCount, TimeGenerated < ago(15m)),
    CurrentMaxCount = maxif(issueCount, TimeGenerated >= ago(15m)),
    LatestIndex = maxif(idx, TimeGenerated >= ago(15m))
    by siteId_s, SiteName
| extend PrevMaxCount = coalesce(PrevMaxCount, tolong(0))
| where CurrentMaxCount > PrevMaxCount
| extend
    TimeGenerated = now(),
    Delta = CurrentMaxCount - PrevMaxCount,
    Activity = strcat('New WAN issue: count rose from ', PrevMaxCount, ' to ', CurrentMaxCount)
| project TimeGenerated, SiteId = siteId_s, SiteName, Activity, IssueIndex = LatestIndex, PrevMaxCount, CurrentMaxCount, Delta

subTechniques:
- T1498.001
incidentConfiguration:
  groupingConfiguration:
    lookbackDuration: PT5H
    reopenClosedIncident: false
    matchingMethod: AllEntities
    enabled: true
  createIncident: true
name: 'UniFi Site Manager: New WAN issue index recorded'
triggerOperator: gt
query: |
  // UniFi reports a monotonically-rising wanIssues.count rather than discrete events.
  // Detect a NEW occurrence by checking whether the per-site max(count) has grown
  // in the most recent 15-min window vs the prior 15-min window.
  Unifi_SiteManager_Sites_CL
  | where TimeGenerated > ago(45m)
  | extend siteId_s = tostring(SiteId)
  | where isnotempty(tostring(SiteStatistics.wans.WAN))
  | mv-expand issue = todynamic(tostring(SiteStatistics.wans.WAN.wanIssues))
  | extend issueCount = tolong(issue.count), idx = tolong(issue.index)
  | summarize
      PrevMaxCount = maxif(issueCount, TimeGenerated < ago(15m)),
      CurrentMaxCount = maxif(issueCount, TimeGenerated >= ago(15m)),
      LatestIndex = maxif(idx, TimeGenerated >= ago(15m))
      by siteId_s, SiteName
  | extend PrevMaxCount = coalesce(PrevMaxCount, tolong(0))
  | where CurrentMaxCount > PrevMaxCount
  | extend
      TimeGenerated = now(),
      Delta = CurrentMaxCount - PrevMaxCount,
      Activity = strcat('New WAN issue: count rose from ', PrevMaxCount, ' to ', CurrentMaxCount)
  | project TimeGenerated, SiteId = siteId_s, SiteName, Activity, IssueIndex = LatestIndex, PrevMaxCount, CurrentMaxCount, Delta
queryFrequency: 15m
description: |
  Identifies a newly-recorded UniFi WAN issue index. May indicate ISP problems, hardware fault, or active denial-of-service pressure on the gateway.
id: 17d09e1b-8a3f-776b-6981-dbe2cc74d097
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/UniFiCloudNewWANissueindexrecorded.yaml
relevantTechniques:
- T1498
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/17d09e1b-8a3f-776b-6981-dbe2cc74d097')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/17d09e1b-8a3f-776b-6981-dbe2cc74d097')]",
      "properties": {
        "alertRuleTemplateName": "17d09e1b-8a3f-776b-6981-dbe2cc74d097",
        "customDetails": null,
        "description": "Identifies a newly-recorded UniFi WAN issue index. May indicate ISP problems, hardware fault, or active denial-of-service pressure on the gateway.\n",
        "displayName": "UniFi Site Manager: New WAN issue index recorded",
        "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/UniFiCloudNewWANissueindexrecorded.yaml",
        "query": "// UniFi reports a monotonically-rising wanIssues.count rather than discrete events.\n// Detect a NEW occurrence by checking whether the per-site max(count) has grown\n// in the most recent 15-min window vs the prior 15-min window.\nUnifi_SiteManager_Sites_CL\n| where TimeGenerated > ago(45m)\n| extend siteId_s = tostring(SiteId)\n| where isnotempty(tostring(SiteStatistics.wans.WAN))\n| mv-expand issue = todynamic(tostring(SiteStatistics.wans.WAN.wanIssues))\n| extend issueCount = tolong(issue.count), idx = tolong(issue.index)\n| summarize\n    PrevMaxCount = maxif(issueCount, TimeGenerated < ago(15m)),\n    CurrentMaxCount = maxif(issueCount, TimeGenerated >= ago(15m)),\n    LatestIndex = maxif(idx, TimeGenerated >= ago(15m))\n    by siteId_s, SiteName\n| extend PrevMaxCount = coalesce(PrevMaxCount, tolong(0))\n| where CurrentMaxCount > PrevMaxCount\n| extend\n    TimeGenerated = now(),\n    Delta = CurrentMaxCount - PrevMaxCount,\n    Activity = strcat('New WAN issue: count rose from ', PrevMaxCount, ' to ', CurrentMaxCount)\n| project TimeGenerated, SiteId = siteId_s, SiteName, Activity, IssueIndex = LatestIndex, PrevMaxCount, CurrentMaxCount, Delta\n",
        "queryFrequency": "PT15M",
        "queryPeriod": "PT45M",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1498"
        ],
        "templateVersion": "1.0.1",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}