Semperis DSP Kerberos krbtgt account with old password

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Id	9ff3b26b-7636-412e-ac46-072b084b94cb
Rulename	Semperis DSP Kerberos krbtgt account with old password
Description	The krbtgt user account is a special (disabled) user account in every Active Directory domain that has a special role in Kerberos function. If this account’s password is compromised, Golden Ticket attacks can be performed to get access to any resource in the AD domain. This indicator looks for a krbtgt user account whose password hasn’t been changed in the past 180 days. While Microsoft recommends changing the password every year, STIG recommends changing it every 180 days.
Severity	Medium
Tactics	CredentialAccess
Techniques	T1558.001
Required data connectors	SemperisDSP
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis%20Directory%20Services%20Protector/Analytic%20Rules/SemperisDSP_KerberoskrbtgtAccount.yaml
Version	2.0.7
Arm template	9ff3b26b-7636-412e-ac46-072b084b94cb.json

KQL

dsp_parser
| where EventID == 9212
| where SecurityIndicatorName == "Kerberos krbtgt account with old password"
| extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))

YAML

severity: Medium
tactics:
- CredentialAccess
queryFrequency: 1h
id: 9ff3b26b-7636-412e-ac46-072b084b94cb
query: |
  dsp_parser
  | where EventID == 9212
  | where SecurityIndicatorName == "Kerberos krbtgt account with old password"
  | extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))
entityMappings:
- fieldMappings:
  - identifier: HostName
    columnName: HostName
  - identifier: DnsDomain
    columnName: DnsDomain
  entityType: Host
kind: Scheduled
triggerOperator: gt
name: Semperis DSP Kerberos krbtgt account with old password
version: 2.0.7
status: Available
requiredDataConnectors:
- dataTypes:
  - dsp_parser
  connectorId: SemperisDSP
description: |
  'The krbtgt user account is a special (disabled) user account in every Active Directory domain that has a special role in Kerberos function. If this account's password is compromised, Golden Ticket attacks can be performed to get access to any resource in the AD domain. This indicator looks for a krbtgt user account whose password hasn't been changed in the past 180 days. While Microsoft recommends changing the password every year, STIG recommends changing it every 180 days.'
relevantTechniques:
- T1558.001
queryPeriod: 1h
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis%20Directory%20Services%20Protector/Analytic%20Rules/SemperisDSP_KerberoskrbtgtAccount.yaml
triggerThreshold: 0

ARM

{
  "$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/9ff3b26b-7636-412e-ac46-072b084b94cb')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/9ff3b26b-7636-412e-ac46-072b084b94cb')]",
      "properties": {
        "alertRuleTemplateName": "9ff3b26b-7636-412e-ac46-072b084b94cb",
        "customDetails": null,
        "description": "'The krbtgt user account is a special (disabled) user account in every Active Directory domain that has a special role in Kerberos function. If this account's password is compromised, Golden Ticket attacks can be performed to get access to any resource in the AD domain. This indicator looks for a krbtgt user account whose password hasn't been changed in the past 180 days. While Microsoft recommends changing the password every year, STIG recommends changing it every 180 days.'\n",
        "displayName": "Semperis DSP Kerberos krbtgt account with old password",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "HostName",
                "identifier": "HostName"
              },
              {
                "columnName": "DnsDomain",
                "identifier": "DnsDomain"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Semperis%20Directory%20Services%20Protector/Analytic%20Rules/SemperisDSP_KerberoskrbtgtAccount.yaml",
        "query": "dsp_parser\n| where EventID == 9212\n| where SecurityIndicatorName == \"Kerberos krbtgt account with old password\"\n| extend HostName = tostring(split(Computer, '.', 0)[0]), DnsDomain = tostring(strcat_array(array_slice(split(Computer, '.'), 1, -1), '.'))\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [
          "T1558.001"
        ],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "CredentialAccess"
        ],
        "techniques": [
          "T1558"
        ],
        "templateVersion": "2.0.7",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}