SecurityEvent
// Fill in the machine name of your CA.
| where EventID == 5059 and Computer contains "<YOUR CA MACHINE NAME>"
| where EventData contains "%%2499" and EventData contains "%%2464"
| extend EventData=parse_xml(EventData)
| mv-apply d=EventData.EventData.Data on
(
where d["@Name"]=="KeyName"
| project KeyName=tostring(d["#text"])
)
| mv-apply d=EventData.EventData.Data on
(
where d["@Name"]=="SubjectUserName"
| project SubjectUserName=tostring(d["#text"])
)
| parse Account with "<YOUR DOMAIN NAME>\\" CleanAccount "$"
| where not(Computer startswith CleanAccount)
queryFrequency: 1h
triggerOperator: gt
tactics:
- DefenseEvasion
description: |
This query identifies someone that performs a backup of they CA key.
status: Available
relevantTechniques:
- T1036
name: Certified Pre-Owned - backup of CA private key - rule 2
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/FalconFriday/Analytic Rules/CertifiedPreOwned-backup-key-2.yaml
severity: Medium
triggerThreshold: 0
version: 1.0.0
entityMappings:
- entityType: Host
fieldMappings:
- identifier: FullName
columnName: Computer
query: |
SecurityEvent
// Fill in the machine name of your CA.
| where EventID == 5059 and Computer contains "<YOUR CA MACHINE NAME>"
| where EventData contains "%%2499" and EventData contains "%%2464"
| extend EventData=parse_xml(EventData)
| mv-apply d=EventData.EventData.Data on
(
where d["@Name"]=="KeyName"
| project KeyName=tostring(d["#text"])
)
| mv-apply d=EventData.EventData.Data on
(
where d["@Name"]=="SubjectUserName"
| project SubjectUserName=tostring(d["#text"])
)
| parse Account with "<YOUR DOMAIN NAME>\\" CleanAccount "$"
| where not(Computer startswith CleanAccount)
id: 88f8fbc0-345d-458e-85f6-f73921d5ef50
requiredDataConnectors:
- connectorId: SecurityEvents
dataTypes:
- SecurityEvent
kind: Scheduled
queryPeriod: 1h
{
"$schema": "https://schema.management.azure.com/schemas/2019-04-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"workspace": {
"type": "String"
}
},
"resources": [
{
"id": "[concat(resourceId('Microsoft.OperationalInsights/workspaces/providers', parameters('workspace'), 'Microsoft.SecurityInsights'),'/alertRules/88f8fbc0-345d-458e-85f6-f73921d5ef50')]",
"name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/88f8fbc0-345d-458e-85f6-f73921d5ef50')]",
"type": "Microsoft.OperationalInsights/workspaces/providers/alertRules",
"kind": "Scheduled",
"apiVersion": "2022-11-01",
"properties": {
"displayName": "Certified Pre-Owned - backup of CA private key - rule 2",
"description": "This query identifies someone that performs a backup of they CA key.\n",
"severity": "Medium",
"enabled": true,
"query": "SecurityEvent\n// Fill in the machine name of your CA.\n| where EventID == 5059 and Computer contains \"<YOUR CA MACHINE NAME>\"\n| where EventData contains \"%%2499\" and EventData contains \"%%2464\"\n| extend EventData=parse_xml(EventData)\n| mv-apply d=EventData.EventData.Data on\n(\n where d[\"@Name\"]==\"KeyName\"\n | project KeyName=tostring(d[\"#text\"])\n)\n| mv-apply d=EventData.EventData.Data on\n(\n where d[\"@Name\"]==\"SubjectUserName\"\n | project SubjectUserName=tostring(d[\"#text\"])\n)\n| parse Account with \"<YOUR DOMAIN NAME>\\\\\" CleanAccount \"$\"\n| where not(Computer startswith CleanAccount)\n",
"queryFrequency": "PT1H",
"queryPeriod": "PT1H",
"triggerOperator": "GreaterThan",
"triggerThreshold": 0,
"suppressionDuration": "PT1H",
"suppressionEnabled": false,
"tactics": [
"DefenseEvasion"
],
"techniques": [
"T1036"
],
"alertRuleTemplateName": "88f8fbc0-345d-458e-85f6-f73921d5ef50",
"customDetails": null,
"entityMappings": [
{
"entityType": "Host",
"fieldMappings": [
{
"identifier": "FullName",
"columnName": "Computer"
}
]
}
],
"OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/FalconFriday/Analytic Rules/CertifiedPreOwned-backup-key-2.yaml",
"status": "Available",
"templateVersion": "1.0.0"
}
}
]
}