Detectionhightest
Suspicious GUP Usage
Detects execution of the Notepad++ updater in a suspicious directory, which is often used in DLL side-loading attacks
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Launch
Florian Roth (Nextron Systems)Created Wed Feb 06Updated Sat Aug 130a4f6091-223b-41f6-8743-f322ec84930bwindows
Log Source
WindowsProcess Creation
ProductWindows← raw: windows
CategoryProcess Creation← raw: process_creation
Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.
Detection Logic
Detection Logic3 selectors
detection:
selection:
Image|endswith: '\GUP.exe'
filter_programfiles:
Image|endswith:
- '\Program Files\Notepad++\updater\GUP.exe'
- '\Program Files (x86)\Notepad++\updater\GUP.exe'
filter_user:
Image|contains: '\Users\'
Image|endswith:
- '\AppData\Local\Notepad++\updater\GUP.exe'
- '\AppData\Roaming\Notepad++\updater\GUP.exe'
condition: selection and not 1 of filter_*False Positives
Execution of tools named GUP.exe and located in folders different than Notepad++\updater
References
MITRE ATT&CK
Rule Metadata
Rule ID
0a4f6091-223b-41f6-8743-f322ec84930b
Status
test
Level
high
Type
Detection
Created
Wed Feb 06
Modified
Sat Aug 13
Path
rules/windows/process_creation/proc_creation_win_gup_suspicious_execution.yml
Raw Tags
attack.privilege-escalationattack.persistenceattack.defense-evasionattack.t1574.001