Suspicious GUP Usage

 1title: Suspicious GUP Usage
 2id: 0a4f6091-223b-41f6-8743-f322ec84930b
 3status: test
 4description: Detects execution of the Notepad++ updater in a suspicious directory, which is often used in DLL side-loading attacks
 5references:
 6    - https://www.fireeye.com/blog/threat-research/2018/09/apt10-targeting-japanese-corporations-using-updated-ttps.html
 7author: Florian Roth (Nextron Systems)
 8date: 2019/02/06
 9modified: 2022/08/13
10tags:
11    - attack.defense_evasion
12    - attack.t1574.002
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection:
18        Image|endswith: '\GUP.exe'
19    filter_programfiles:
20        Image|endswith:
21            - '\Program Files\Notepad++\updater\GUP.exe'
22            - '\Program Files (x86)\Notepad++\updater\GUP.exe'
23    filter_user:
24        Image|contains: '\Users\'
25        Image|endswith:
26            - '\AppData\Local\Notepad++\updater\GUP.exe'
27            - '\AppData\Roaming\Notepad++\updater\GUP.exe'
28    condition: selection and not 1 of filter_*
29falsepositives:
30    - Execution of tools named GUP.exe and located in folders different than Notepad++\updater
31level: high