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Category: Malware

Type: Backdoor

Aliases: Backdoor:W32/Spyrat.D


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


Automatic action

Based on the settings of your F-Secure security product, it will either automatically delete, quarantine or rename the detected program or file, or ask you for a desired action.

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About the product

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Submit a sample

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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 chucknorris.zapto.org at port 150 to get its command.