CiscoISE - Device changed IP in last 24 hours

let lbtime_48h = 48h;
let lbtime_24h = 24h;
CiscoISEEvent
| where TimeGenerated between (ago(lbtime_48h) .. ago(lbtime_24h))
| where notempty(DvcIpAddr) and notempty(DvcHostname)
| summarize knownIPs = make_set(DvcIpAddr) by DvcHostname
| join (CiscoISEEvent
      | where TimeGenerated > ago(lbtime_24h)
      | where notempty(DvcIpAddr) and notempty(DvcHostname)
      | summarize evts = count() by DvcHostname, DvcIpAddr
      | project-away evts) on DvcHostname
| project-away DvcHostname1
| where knownIPs !contains DvcIpAddr
| extend HostCustomEntity = DvcHostname
| extend IPCustomEntity = DvcIpAddr

queryPeriod: 1h
kind: Scheduled
requiredDataConnectors:
- dataTypes:
  - Syslog
  connectorId: CiscoISE
triggerThreshold: 0
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: HostCustomEntity
  entityType: Host
- fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
  entityType: IP
name: CiscoISE - Device changed IP in last 24 hours
status: Available
query: |
  let lbtime_48h = 48h;
  let lbtime_24h = 24h;
  CiscoISEEvent
  | where TimeGenerated between (ago(lbtime_48h) .. ago(lbtime_24h))
  | where notempty(DvcIpAddr) and notempty(DvcHostname)
  | summarize knownIPs = make_set(DvcIpAddr) by DvcHostname
  | join (CiscoISEEvent
        | where TimeGenerated > ago(lbtime_24h)
        | where notempty(DvcIpAddr) and notempty(DvcHostname)
        | summarize evts = count() by DvcHostname, DvcIpAddr
        | project-away evts) on DvcHostname
  | project-away DvcHostname1
  | where knownIPs !contains DvcIpAddr
  | extend HostCustomEntity = DvcHostname
  | extend IPCustomEntity = DvcIpAddr  
queryFrequency: 1h
id: 0c509e9b-121e-4951-9f9b-43722e052b4f
severity: Medium
description: |
    'Detects when device changes IP address in last 24 hours.'
version: 1.0.0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco ISE/Analytic Rules/CiscoISEDeviceChangedIP.yaml
triggerOperator: gt

{
  "$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
  "contentVersion": "1.0.0.0",
  "parameters": {
    "workspace": {
      "type": "String"
    }
  },
  "resources": [
    {
      "apiVersion": "2023-02-01-preview",
      "id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/0c509e9b-121e-4951-9f9b-43722e052b4f')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/0c509e9b-121e-4951-9f9b-43722e052b4f')]",
      "properties": {
        "alertRuleTemplateName": "0c509e9b-121e-4951-9f9b-43722e052b4f",
        "customDetails": null,
        "description": "'Detects when device changes IP address in last 24 hours.'\n",
        "displayName": "CiscoISE - Device changed IP in last 24 hours",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "HostCustomEntity",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "IP",
            "fieldMappings": [
              {
                "columnName": "IPCustomEntity",
                "identifier": "Address"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco ISE/Analytic Rules/CiscoISEDeviceChangedIP.yaml",
        "query": "let lbtime_48h = 48h;\nlet lbtime_24h = 24h;\nCiscoISEEvent\n| where TimeGenerated between (ago(lbtime_48h) .. ago(lbtime_24h))\n| where notempty(DvcIpAddr) and notempty(DvcHostname)\n| summarize knownIPs = make_set(DvcIpAddr) by DvcHostname\n| join (CiscoISEEvent\n      | where TimeGenerated > ago(lbtime_24h)\n      | where notempty(DvcIpAddr) and notempty(DvcHostname)\n      | summarize evts = count() by DvcHostname, DvcIpAddr\n      | project-away evts) on DvcHostname\n| project-away DvcHostname1\n| where knownIPs !contains DvcIpAddr\n| extend HostCustomEntity = DvcHostname\n| extend IPCustomEntity = DvcIpAddr\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}