SigmaHQ/rules/windows/process_creation/win_susp_gup.yml

title: Suspicious GUP Usage
description: Detects execution of the Notepad++ updater in a suspicious directory, which is often used in DLL side-loading attacks
status: experimental
references:
    - https://www.fireeye.com/blog/threat-research/2018/09/apt10-targeting-japanese-corporations-using-updated-ttps.html
tags:
  - attack.defense_evasion
  - attack.t1073
author: Florian Roth
date: 2019/02/06
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        Image: '*\GUP.exe'
    filter:
        Image:
            - 'C:\Users\*\AppData\Local\Notepad++\updater\gup.exe'
            - 'C:\Users\*\AppData\Roaming\Notepad++\updater\gup.exe'
            - 'C:\Program Files\Notepad++\updater\gup.exe'
            - 'C:\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