Detecting UAC bypass - elevated COM interface

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Id	2d5efc71-2e91-4ca2-8506-857eecb453ec
Rulename	Detecting UAC bypass - elevated COM interface
Description	This query identifies processes spawned with high integrity from dllhost.exe with a command line that contains one of three specific CLSID GUIDs.
Severity	Medium
Tactics	Impact
Techniques	T1490
Required data connectors	MicrosoftThreatProtection
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/FalconFriday/Analytic Rules/UACBypass-1-elevated-COM.yaml
Version	1.0.0
Arm template	2d5efc71-2e91-4ca2-8506-857eecb453ec.json

KQL

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")

YAML

triggerThreshold: 0
entityMappings:
- entityType: Host
  fieldMappings:
  - identifier: FullName
    columnName: DeviceName
- entityType: Account
  fieldMappings:
  - identifier: Sid
    columnName: AccountSid
  - identifier: Name
    columnName: AccountName
  - identifier: NTDomain
    columnName: AccountDomain
- entityType: Process
  fieldMappings:
  - identifier: CommandLine
    columnName: ProcessCommandLine
requiredDataConnectors:
- dataTypes:
  - DeviceProcessEvents
  connectorId: MicrosoftThreatProtection
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/FalconFriday/Analytic Rules/UACBypass-1-elevated-COM.yaml
name: Detecting UAC bypass - elevated COM interface
relevantTechniques:
- T1490
status: Available
version: 1.0.0
queryPeriod: 1h
kind: Scheduled
id: 2d5efc71-2e91-4ca2-8506-857eecb453ec
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")  
description: |
    This query identifies processes spawned with high integrity from dllhost.exe with a command line that contains one of three specific CLSID GUIDs.
queryFrequency: 1h
severity: Medium
triggerOperator: gt
tactics:
- Impact

ARM