let a_vm =
VMwareESXi
| where SyslogMessage has ('VmPoweredOnEvent')
| extend DstHostname = extract(@'\[\d+\]\s+\[(.*?)\s+on', 1, SyslogMessage)
| summarize vm_l = makeset(DstHostname)
| extend k=1;
VMwareESXi
| where SyslogMessage has ('VmPoweredOnEvent')
| extend DstHostname = extract(@'\[\d+\]\s+\[(.*?)\s+on', 1, SyslogMessage)
| extend k = 1
| join (a_vm) on k
| where vm_l !has DstHostname
| extend HostCustomEntity = DstHostname
entityMappings:
- entityType: Host
fieldMappings:
- identifier: FullName
columnName: HostCustomEntity
queryFrequency: 1h
name: VMware ESXi - New VM started
kind: Scheduled
tactics:
- InitialAccess
triggerThreshold: 0
query: |
let a_vm =
VMwareESXi
| where SyslogMessage has ('VmPoweredOnEvent')
| extend DstHostname = extract(@'\[\d+\]\s+\[(.*?)\s+on', 1, SyslogMessage)
| summarize vm_l = makeset(DstHostname)
| extend k=1;
VMwareESXi
| where SyslogMessage has ('VmPoweredOnEvent')
| extend DstHostname = extract(@'\[\d+\]\s+\[(.*?)\s+on', 1, SyslogMessage)
| extend k = 1
| join (a_vm) on k
| where vm_l !has DstHostname
| extend HostCustomEntity = DstHostname
relevantTechniques:
- T1078
triggerOperator: gt
queryPeriod: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/VMWareESXi/Analytic Rules/ESXiNewVM.yaml
severity: Medium
status: Available
id: 0f4a80de-344f-47c0-bc19-cb120c59b6f0
requiredDataConnectors:
- connectorId: SyslogAma
datatypes:
- Syslog
version: 1.0.2
description: |
'Detects when new VM was started.'
{
"$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/0f4a80de-344f-47c0-bc19-cb120c59b6f0')]",
"kind": "Scheduled",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/0f4a80de-344f-47c0-bc19-cb120c59b6f0')]",
"properties": {
"alertRuleTemplateName": "0f4a80de-344f-47c0-bc19-cb120c59b6f0",
"customDetails": null,
"description": "'Detects when new VM was started.'\n",
"displayName": "VMware ESXi - New VM started",
"enabled": true,
"entityMappings": [
{
"entityType": "Host",
"fieldMappings": [
{
"columnName": "HostCustomEntity",
"identifier": "FullName"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/VMWareESXi/Analytic Rules/ESXiNewVM.yaml",
"query": "let a_vm = \nVMwareESXi\n| where SyslogMessage has ('VmPoweredOnEvent')\n| extend DstHostname = extract(@'\\[\\d+\\]\\s+\\[(.*?)\\s+on', 1, SyslogMessage)\n| summarize vm_l = makeset(DstHostname)\n| extend k=1;\nVMwareESXi\n| where SyslogMessage has ('VmPoweredOnEvent')\n| extend DstHostname = extract(@'\\[\\d+\\]\\s+\\[(.*?)\\s+on', 1, SyslogMessage)\n| extend k = 1\n| join (a_vm) on k\n| where vm_l !has DstHostname\n| extend HostCustomEntity = DstHostname\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"severity": "Medium",
"status": "Available",
"subTechniques": [],
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"InitialAccess"
],
"techniques": [
"T1078"
],
"templateVersion": "1.0.2",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0
},
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
}
]
}