File Download Using Notepad++ GUP Utility

 1title: File Download Using Notepad++ GUP Utility
 2id: 44143844-0631-49ab-97a0-96387d6b2d7c
 3status: test
 4description: Detects execution of the Notepad++ updater (gup) from a process other than Notepad++ to download files.
 5references:
 6    - https://twitter.com/nas_bench/status/1535322182863179776
 7author: Nasreddine Bencherchali (Nextron Systems)
 8date: 2022-06-10
 9modified: 2023-03-02
10tags:
11    - attack.command-and-control
12    - attack.t1105
13logsource:
14    category: process_creation
15    product: windows
16detection:
17    selection_img:
18        - Image|endswith: '\GUP.exe'
19        - OriginalFileName: 'gup.exe'
20    selection_cli:
21        CommandLine|contains|all:
22            - ' -unzipTo '
23            - 'http'
24    filter:
25        ParentImage|endswith: '\notepad++.exe'
26    condition: all of selection* and not filter
27falsepositives:
28    - Other parent processes other than notepad++ using GUP that are not currently identified
29level: high