CiscoISE - Device changed IP in last 24 hours

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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	CiscoISE 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 ISE/Analytic Rules/CiscoISEDeviceChangedIP.yaml
Version	1.0.2
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

kind: Scheduled
relevantTechniques:
- T1568
description: |
    'Detects when device changes IP address in last 24 hours.'
queryPeriod: 1h
queryFrequency: 1h
tactics:
- CommandAndControl
name: CiscoISE - Device changed IP in last 24 hours
requiredDataConnectors:
- connectorId: CiscoISE
  dataTypes:
  - Syslog
- connectorId: SyslogAma
  datatypes:
  - Syslog
entityMappings:
- entityType: Host
  fieldMappings:
  - identifier: FullName
    columnName: HostCustomEntity
- entityType: IP
  fieldMappings:
  - identifier: Address
    columnName: IPCustomEntity
triggerThreshold: 0
version: 1.0.2
id: 0c509e9b-121e-4951-9f9b-43722e052b4f
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  
status: Available
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco ISE/Analytic Rules/CiscoISEDeviceChangedIP.yaml
severity: Medium

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 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",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CommandAndControl"
        ],
        "techniques": [
          "T1568"
        ],
        "templateVersion": "1.0.2",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}