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
triggerOperator: gt
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Cisco ISE/Analytic Rules/CiscoISEDeviceChangedIP.yaml
requiredDataConnectors:
- datatypes:
- Syslog
connectorId: SyslogAma
description: |
'Detects when device changes IP address in last 24 hours.'
severity: Medium
queryPeriod: 1h
kind: Scheduled
tactics:
- CommandAndControl
queryFrequency: 1h
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
version: 1.0.3
triggerThreshold: 0
name: CiscoISE - Device changed IP in last 24 hours
entityMappings:
- entityType: Host
fieldMappings:
- columnName: HostCustomEntity
identifier: FullName
- entityType: IP
fieldMappings:
- columnName: IPCustomEntity
identifier: Address
status: Available
relevantTechniques:
- T1568
{
"$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": "1.0.3",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}