
title: Suspicious RazerInstaller Explorer Subprocess
author: Florian Roth, Maxime Thiebaut
date: 2021/08/23
description: Detects a explorer.exe sub process of the RazerInstaller software which
  can be invoked from the installer to select a different installation folder but
  can also be exploited to escalate privileges to LOCAL SYSTEM
detection:
  SELECTION_1:
    EventID: 1
  SELECTION_2:
    ParentImage: '*\RazerInstaller.exe'
  SELECTION_3:
    IntegrityLevel: System
  SELECTION_4:
    Image: C:\Windows\Installer\Razer\Installer\\*
  condition: (SELECTION_1 and (SELECTION_2 and SELECTION_3) and  not (SELECTION_4))
falsepositives:
- User selecting a different installation folder (check for other sub processes of
  this explorer.exe process)
id: a4eaf250-7dc1-4842-862a-5e71cd59a167
level: high
logsource:
  category: process_creation
  product: windows
modified: 2021/08/24
references:
- https://twitter.com/j0nh4t/status/1429049506021138437
- https://streamable.com/q2dsji
status: experimental
tags:
- attack.privilege_escalation
- attack.t1553
ruletype: SIGMA
