Possible DLL Sideloading Of Libcurl.DLL Through GUP.EXE (via image_load)

title: Possible DLL Sideloading Of Libcurl.DLL Through GUP.EXE (via image_load)
id: fce27c14-b76d-5466-a97f-4ac300e80d0a
status: stable
description: This rule detects potential DLL sideloading of "libcurl.dll" by the "gup.exe" process from an uncommon location
references:
    - https://attack.mitre.org/techniques/T1574/001/
    - https://labs.withsecure.com/publications/fin7-target-veeam-servers
author: Huntrule Team
date: 2026-02-08
tags:
    - attack.persistence
    - attack.privilege-escalation
    - attack.execution
    - attack.stealth
    - attack.t1574.001
logsource:
    category: image_load
    product: windows
detection:
    selection:
        Image|endswith: '\gup.exe'
        ImageLoaded|endswith: '\libcurl.dll'
    filter_main_notepad_plusplus:
        Image|endswith: '\Notepad++\updater\GUP.exe'
    condition: selection and not 1 of filter_main_*
falsepositives:
    - Unknown
level: medium