Potential Fodhelper UAC Bypass (ASIM Version)

id: ac9e233e-44d4-45eb-b522-6e47445f6582
name: Potential Fodhelper UAC Bypass (ASIM Version)
description: |
  'This detection looks for the steps required to conduct a UAC bypass using Fodhelper.exe. By default this detection looks for the setting of the required registry keys and the invoking of the process within 1 hour - this can be tweaked as required.'
severity: Medium
requiredDataConnectors: []
queryFrequency: 2h
queryPeriod: 2h
triggerOperator: gt
triggerThreshold: 0
tactics:
  - PrivilegeEscalation
relevantTechniques:
  - T1548.002
query: |
  imRegistry
    | where EventType in ("RegistryValueSet", "RegistryKeyCreated")
    | where RegistryKey has "Software\\Classes\\ms-settings\\shell\\open\\command"
    | extend TimeKey = bin(TimeGenerated, 1h)
    | join (imProcess
    | where Process endswith "fodhelper.exe"
    | where ParentProcessName endswith "cmd.exe" or ParentProcessName endswith "powershell.exe" or ParentProcessName endswith "powershell_ise.exe"
    | extend TimeKey = bin(TimeGenerated, 1h)) on TimeKey, Dvc
entityMappings:
  - entityType: Host
    fieldMappings:
      - identifier: FullName
        columnName: DvcHostname
  - entityType: IP
    fieldMappings:
      - identifier: Address
        columnName: DvcIpAddr
  - entityType: Account
    fieldMappings:
      - identifier: FullName
        columnName: ActorUsername
version: 1.0.5
kind: Scheduled
metadata:
    source:
        kind: Community
    author:
        name: Pete Bryan
    support:
        tier: Community
    categories:
        domains: [ "Security - Others" ]