Detecting UAC bypass - elevated COM interface

DeviceProcessEvents
| where InitiatingProcessFileName =~ "dllhost.exe"
| where ProcessIntegrityLevel == "High"
| where InitiatingProcessCommandLine has_any ("E9495B87-D950-4AB5-87A5-FF6D70BF3E90", "3E5FC7F9-9A51-4367-9063-A120244FBEC7", "D2E7041B-2927-42fb-8E9F-7CE93B6DC937")

relevantTechniques:
- T1490
name: Detecting UAC bypass - elevated COM interface
requiredDataConnectors:
- dataTypes:
  - DeviceProcessEvents
  connectorId: MicrosoftThreatProtection
entityMappings:
- fieldMappings:
  - identifier: FullName
    columnName: DeviceName
  entityType: Host
- fieldMappings:
  - identifier: Sid
    columnName: AccountSid
  - identifier: Name
    columnName: AccountName
  - identifier: NTDomain
    columnName: AccountDomain
  entityType: Account
- fieldMappings:
  - identifier: CommandLine
    columnName: ProcessCommandLine
  entityType: Process
triggerThreshold: 0
id: 2d5efc71-2e91-4ca2-8506-857eecb453ec
tactics:
- Impact
version: 1.0.0
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/FalconFriday/Analytic Rules/UACBypass-1-elevated-COM.yaml
queryPeriod: 1h
kind: Scheduled
queryFrequency: 1h
severity: Medium
status: Available
description: |
    This query identifies processes spawned with high integrity from dllhost.exe with a command line that contains one of three specific CLSID GUIDs.
query: |
  DeviceProcessEvents
  | where InitiatingProcessFileName =~ "dllhost.exe"
  | where ProcessIntegrityLevel == "High"
  | where InitiatingProcessCommandLine has_any ("E9495B87-D950-4AB5-87A5-FF6D70BF3E90", "3E5FC7F9-9A51-4367-9063-A120244FBEC7", "D2E7041B-2927-42fb-8E9F-7CE93B6DC937")  
triggerOperator: gt

{
  "$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/2d5efc71-2e91-4ca2-8506-857eecb453ec')]",
      "kind": "Scheduled",
      "name": "[concat(parameters('workspace'),'/Microsoft.SecurityInsights/2d5efc71-2e91-4ca2-8506-857eecb453ec')]",
      "properties": {
        "alertRuleTemplateName": "2d5efc71-2e91-4ca2-8506-857eecb453ec",
        "customDetails": null,
        "description": "This query identifies processes spawned with high integrity from dllhost.exe with a command line that contains one of three specific CLSID GUIDs.\n",
        "displayName": "Detecting UAC bypass - elevated COM interface",
        "enabled": true,
        "entityMappings": [
          {
            "entityType": "Host",
            "fieldMappings": [
              {
                "columnName": "DeviceName",
                "identifier": "FullName"
              }
            ]
          },
          {
            "entityType": "Account",
            "fieldMappings": [
              {
                "columnName": "AccountSid",
                "identifier": "Sid"
              },
              {
                "columnName": "AccountName",
                "identifier": "Name"
              },
              {
                "columnName": "AccountDomain",
                "identifier": "NTDomain"
              }
            ]
          },
          {
            "entityType": "Process",
            "fieldMappings": [
              {
                "columnName": "ProcessCommandLine",
                "identifier": "CommandLine"
              }
            ]
          }
        ],
        "OriginalUri": "https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/FalconFriday/Analytic Rules/UACBypass-1-elevated-COM.yaml",
        "query": "DeviceProcessEvents\n| where InitiatingProcessFileName =~ \"dllhost.exe\"\n| where ProcessIntegrityLevel == \"High\"\n| where InitiatingProcessCommandLine has_any (\"E9495B87-D950-4AB5-87A5-FF6D70BF3E90\", \"3E5FC7F9-9A51-4367-9063-A120244FBEC7\", \"D2E7041B-2927-42fb-8E9F-7CE93B6DC937\")\n",
        "queryFrequency": "PT1H",
        "queryPeriod": "PT1H",
        "severity": "Medium",
        "status": "Available",
        "subTechniques": [],
        "suppressionDuration": "PT1H",
        "suppressionEnabled": false,
        "tactics": [
          "Impact"
        ],
        "techniques": [
          "T1490"
        ],
        "templateVersion": "1.0.0",
        "triggerOperator": "GreaterThan",
        "triggerThreshold": 0
      },
      "type": "Microsoft.OperationalInsights/workspaces/providers/alertRules"
    }
  ]
}