let vm_p_off =
VMwareESXi
| where TimeGenerated > ago(14d)
| where SyslogMessage has ('VmPoweredOffEvent')
| extend DstHostname = extract(@'\[\d+\]\s+\[(.*?)\s+on', 1, SyslogMessage)
| summarize LastPowerOffTime=max(TimeGenerated) by DstHostname
| where datetime_diff('day',datetime(now),LastPowerOffTime) >= 20;
let vm_p_on =
VMwareESXi
| where TimeGenerated > ago(14d)
| where SyslogMessage has ('VmPoweredOnEvent')
| extend DstHostname = extract(@'\[\d+\]\s+\[(.*?)\s+on', 1, SyslogMessage)
| summarize LastPowerOnTime=max(TimeGenerated) by DstHostname
| where datetime_diff('day',datetime(now),LastPowerOnTime) >= 20;
let off_vms =
vm_p_on
| join (vm_p_off) on DstHostname
| where LastPowerOffTime > LastPowerOnTime
| summarize p_off_vm = makeset(DstHostname)
| extend k=1;
VMwareESXi
| where TimeGenerated between (ago(24h) .. datetime(now))
| where SyslogMessage has ('VmPoweredOnEvent')
| extend DstHostname = extract(@'\[\d+\]\s+\[(.*?)\s+on', 1, SyslogMessage)
| extend k=1
| join (off_vms) on k
| where p_off_vm !has DstHostname
| summarize rec_p_on = makeset(DstHostname)
| extend HostCustomEntity = rec_p_on
name: VMware ESXi - Dormant VM started
query: |
let vm_p_off =
VMwareESXi
| where TimeGenerated > ago(14d)
| where SyslogMessage has ('VmPoweredOffEvent')
| extend DstHostname = extract(@'\[\d+\]\s+\[(.*?)\s+on', 1, SyslogMessage)
| summarize LastPowerOffTime=max(TimeGenerated) by DstHostname
| where datetime_diff('day',datetime(now),LastPowerOffTime) >= 20;
let vm_p_on =
VMwareESXi
| where TimeGenerated > ago(14d)
| where SyslogMessage has ('VmPoweredOnEvent')
| extend DstHostname = extract(@'\[\d+\]\s+\[(.*?)\s+on', 1, SyslogMessage)
| summarize LastPowerOnTime=max(TimeGenerated) by DstHostname
| where datetime_diff('day',datetime(now),LastPowerOnTime) >= 20;
let off_vms =
vm_p_on
| join (vm_p_off) on DstHostname
| where LastPowerOffTime > LastPowerOnTime
| summarize p_off_vm = makeset(DstHostname)
| extend k=1;
VMwareESXi
| where TimeGenerated between (ago(24h) .. datetime(now))
| where SyslogMessage has ('VmPoweredOnEvent')
| extend DstHostname = extract(@'\[\d+\]\s+\[(.*?)\s+on', 1, SyslogMessage)
| extend k=1
| join (off_vms) on k
| where p_off_vm !has DstHostname
| summarize rec_p_on = makeset(DstHostname)
| extend HostCustomEntity = rec_p_on
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/VMWareESXi/Analytic Rules/ESXiDormantVMStarted.yaml
queryFrequency: 1h
triggerThreshold: 0
requiredDataConnectors:
- dataTypes:
- VMwareESXi
connectorId: VMwareESXi
version: 1.0.0
queryPeriod: 14d
id: 4cdcd5d8-89df-4076-a917-bc50abb9f2ab
triggerOperator: gt
entityMappings:
- fieldMappings:
- identifier: FullName
columnName: HostCustomEntity
entityType: Host
relevantTechniques:
- T1190
severity: Medium
description: |
'Detects when dormant VM was started.'
kind: Scheduled
tactics:
- InitialAccess
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/4cdcd5d8-89df-4076-a917-bc50abb9f2ab')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/4cdcd5d8-89df-4076-a917-bc50abb9f2ab')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "VMware ESXi - Dormant VM started",
"description": "'Detects when dormant VM was started.'\n",
"severity": "Medium",
"enabled": true,
"query": "let vm_p_off =\nVMwareESXi\n| where TimeGenerated > ago(14d)\n| where SyslogMessage has ('VmPoweredOffEvent')\n| extend DstHostname = extract(@'\\[\\d+\\]\\s+\\[(.*?)\\s+on', 1, SyslogMessage)\n| summarize LastPowerOffTime=max(TimeGenerated) by DstHostname\n| where datetime_diff('day',datetime(now),LastPowerOffTime) >= 20; \nlet vm_p_on =\nVMwareESXi\n| where TimeGenerated > ago(14d)\n| where SyslogMessage has ('VmPoweredOnEvent')\n| extend DstHostname = extract(@'\\[\\d+\\]\\s+\\[(.*?)\\s+on', 1, SyslogMessage)\n| summarize LastPowerOnTime=max(TimeGenerated) by DstHostname\n| where datetime_diff('day',datetime(now),LastPowerOnTime) >= 20;\nlet off_vms =\nvm_p_on\n| join (vm_p_off) on DstHostname\n| where LastPowerOffTime > LastPowerOnTime\n| summarize p_off_vm = makeset(DstHostname)\n| extend k=1;\nVMwareESXi\n| where TimeGenerated between (ago(24h) .. datetime(now))\n| where SyslogMessage has ('VmPoweredOnEvent')\n| extend DstHostname = extract(@'\\[\\d+\\]\\s+\\[(.*?)\\s+on', 1, SyslogMessage)\n| extend k=1\n| join (off_vms) on k\n| where p_off_vm !has DstHostname\n| summarize rec_p_on = makeset(DstHostname)\n| extend HostCustomEntity = rec_p_on\n",
"queryFrequency": "PT1H",
"queryPeriod": "P14D",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1190"
],
"alertRuleTemplateName": "4cdcd5d8-89df-4076-a917-bc50abb9f2ab",
"customDetails": null,
"entityMappings": [
{
"fieldMappings": [
{
"identifier": "FullName",
"columnName": "HostCustomEntity"
}
],
"entityType": "Host"
}
],
"templateVersion": "1.0.0",
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/VMWareESXi/Analytic Rules/ESXiDormantVMStarted.yaml"
}
}
]
}