CiscoISE - Device changed IP in last 24 hours | Microsoft Sentinel Analytic Rules

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Id	0c509e9b-121e-4951-9f9b-43722e052b4f
Rulename	CiscoISE - Device changed IP in last 24 hours
Description	Detects when device changes IP address in last 24 hours.
Severity	Medium
Tactics	CommandAndControl
Techniques	T1568
Required data connectors	SyslogAma
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco%20ISE/Analytic%20Rules/CiscoISEDeviceChangedIP.yaml
Version	1.0.3
Arm template	0c509e9b-121e-4951-9f9b-43722e052b4f.json

KQL

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

YAML

OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco%20ISE/Analytic%20Rules/CiscoISEDeviceChangedIP.yaml
entityMappings:
- fieldMappings:
  - columnName: HostCustomEntity
    identifier: FullName
  entityType: Host
- fieldMappings:
  - columnName: IPCustomEntity
    identifier: Address
  entityType: IP
relevantTechniques:
- T1568
triggerOperator: gt
queryPeriod: 1h
severity: Medium
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
id: 0c509e9b-121e-4951-9f9b-43722e052b4f
triggerThreshold: 0
requiredDataConnectors:
- connectorId: SyslogAma
  datatypes:
  - Syslog
queryFrequency: 1h
kind: Scheduled
status: Available
version: 1.0.3
description: |
  'Detects when device changes IP address in last 24 hours.'
tactics:
- CommandAndControl
name: CiscoISE - Device changed IP in last 24 hours

ARM

{
  "$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/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%20ISE/Analytic%20Rules/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",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1568"
        ],
        "templateVersion": "1.0.3",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}