let threshold = 100;
VMwareESXi
| where SyslogMessage has ('Patch store disk')
| extend sp = toreal(extract(@'free space is:\s(\d+)', 1, SyslogMessage)) / 1000000000
| where sp < threshold
| extend h = 'Hypervisor'
| extend HostCustomEntity = h
requiredDataConnectors:
- connectorId: VMwareESXi
dataTypes:
- VMwareESXi
triggerOperator: gt
queryFrequency: 1h
name: VMware ESXi - Low patch disk space
status: Available
queryPeriod: 1h
id: 48d992ba-d404-4159-a8c6-46f51d1325c7
description: |
'This rule is triggered when low patch disk store space is detected.'
severity: Medium
query: |
let threshold = 100;
VMwareESXi
| where SyslogMessage has ('Patch store disk')
| extend sp = toreal(extract(@'free space is:\s(\d+)', 1, SyslogMessage)) / 1000000000
| where sp < threshold
| extend h = 'Hypervisor'
| extend HostCustomEntity = h
version: 1.0.0
kind: Scheduled
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/VMWareESXi/Analytic Rules/ESXiLowPatchDiskSpace.yaml
entityMappings:
- entityType: Host
fieldMappings:
- identifier: FullName
columnName: HostCustomEntity
relevantTechniques:
- T1529
tactics:
- Impact
triggerThreshold: 0
{
"$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/48d992ba-d404-4159-a8c6-46f51d1325c7')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/48d992ba-d404-4159-a8c6-46f51d1325c7')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01-preview",
"properties": {
"displayName": "VMware ESXi - Low patch disk space",
"description": "'This rule is triggered when low patch disk store space is detected.'\n",
"severity": "Medium",
"enabled": true,
"query": "let threshold = 100;\nVMwareESXi\n| where SyslogMessage has ('Patch store disk')\n| extend sp = toreal(extract(@'free space is:\\s(\\d+)', 1, SyslogMessage)) / 1000000000\n| where sp < threshold\n| extend h = 'Hypervisor'\n| extend HostCustomEntity = h\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"Impact"
],
"techniques": [
"T1529"
],
"alertRuleTemplateName": "48d992ba-d404-4159-a8c6-46f51d1325c7",
"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/ESXiLowPatchDiskSpace.yaml",
"status": "Available"
}
}
]
}