Detectionhighexperimental

Suspicious Child Process of Notepad++ Updater - GUP.Exe

Detects suspicious child process creation by the Notepad++ updater process (gup.exe). This could indicate potential exploitation of the updater component to deliver unwanted malware.

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Launch

Swachchhanda Shrawan Poudel (Nextron Systems)Created Tue Feb 03bb0e87ce-c89f-4857-84fa-095e4483e9cbwindows

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:
    selection_parent:
        ParentImage|endswith: '\gup.exe'
    selection_child_img:
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
            - '\pwsh.exe'
            - '\cscript.exe'
            - '\wscript.exe'
            - '\mshta.exe'
    selection_child_cli:
        CommandLine|contains:
            - 'bitsadmin'
            - 'certutil'
            - 'curl'
            - 'finger'
            - 'forfiles'
            - 'regsvr32'
            - 'rundll32'
            - 'wget'
    condition: selection_parent and 1 of selection_child_*