Threat Descriptions



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A remote administration utility that bypasses normal security mechanisms to secretly control a program, computer or network.


Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    Note: If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note: You need administrative rights to change the settings.

Technical Details


The malware creates a dummy winlogon.exe process where it runs its malicious threads and drops the following copy:

  • %appdata%\Winlogon\winlogon.exe

It also creates a legitimate winlogon.exe to %windir%\system32\install\Windows.exe.


The malware creates the following registry launch point:

  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run %path_of_executed_file% = %appdata%\Winlogon\winlogon.exe

The following registry entries would also be created:

  • HKEY_CURRENT_USER\Software\chuck norris FirstExecution = %date_time% NewIdentification = "chuck norris" NewGroup = 2

Backdoor Functionality

The malware is a reverse connection remote administration tool. It connects to at port 150 to get its command.

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More Support


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Submit a Sample

Submit a file or URL for analysis.