title: Suspicious GUP Usage
id: 0a4f6091-223b-41f6-8743-f322ec84930b
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.t1574.002
    - attack.t1073      # an old one
author: Florian Roth
date: 2019/02/06
modified: 2020/11/09
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