Emerging Threathightest

PaperCut MF/NG Potential Exploitation

Detects suspicious child processes of "pc-app.exe". Which could indicate potential exploitation of PaperCut

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Open this Sigma rule in the converter with the YAML preloaded and ready for backend selection.

Nasreddine Bencherchali (Nextron Systems), Huntress DE&TH TeamCreated Thu Apr 20Updated Tue Apr 250934ac71-a331-4e98-a034-d49c491fbbcb2023

Emerging Threat

Active Threat

Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.

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:
        ParentImage|endswith: '\pc-app.exe'
        Image|endswith:
            - '\bash.exe'
            - '\calc.exe'
            - '\certutil.exe'
            - '\cmd.exe'
            - '\csc.exe'
            - '\cscript.exe'
            - '\dllhost.exe'
            - '\mshta.exe'
            - '\msiexec.exe'
            - '\powershell.exe'
            - '\pwsh.exe'
            - '\regsvr32.exe'
            - '\rundll32.exe'
            - '\scriptrunner.exe'
            - '\wmic.exe'
            - '\wscript.exe'
            - '\wsl.exe'
    condition: selection