title: Suspicious GUP Usage
id: 0a4f6091-223b-41f6-8743-f322ec84930b
status: test
description: Detects execution of the Notepad++ updater in a suspicious directory, which is often used in DLL side-loading attacks
author: Florian Roth
references:
  - https://www.fireeye.com/blog/threat-research/2018/09/apt10-targeting-japanese-corporations-using-updated-ttps.html
date: 2019/02/06
modified: 2021/11/27
logsource:
  category: process_creation
  product: windows
detection:
  selection:
    Image|endswith: '\GUP.exe'
  filter:
    Image|endswith:
      - '\Users\\*\AppData\Local\Notepad++\updater\GUP.exe'
      - '\Users\\*\AppData\Roaming\Notepad++\updater\GUP.exe'
      - '\Program Files\Notepad++\updater\GUP.exe'
      - '\Program Files (x86)\Notepad++\updater\GUP.exe'
  condition: selection and not filter
falsepositives:
  - Execution of tools named GUP.exe and located in folders different than Notepad++\updater
level: high
tags:
  - attack.defense_evasion
  - attack.t1574.002