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.privilege-escalation
12    - attack.persistence
13    - attack.execution
14    - attack.stealth
15    - attack.t1574.001
16logsource:
17    category: process_creation
18    product: windows
19detection:
20    selection:
21        Image|endswith: '\GUP.exe'
22    filter_programfiles:
23        Image|endswith:
24            - '\Program Files\Notepad++\updater\GUP.exe'
25            - '\Program Files (x86)\Notepad++\updater\GUP.exe'
26    filter_user:
27        Image|contains: '\Users\'
28        Image|endswith:
29            - '\AppData\Local\Notepad++\updater\GUP.exe'
30            - '\AppData\Roaming\Notepad++\updater\GUP.exe'
31    condition: selection and not 1 of filter_*
32falsepositives:
33    - Execution of tools named GUP.exe and located in folders different than Notepad++\updater
34level: high