Threat Description

Backdoor:​W32/Spyrat.D

Details

Aliases:Backdoor:​W32/Spyrat.D
Category:Malware
Type:Backdoor
Platform:W32

Summary



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



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.



Technical Details



Installation

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.

Registry

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.






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