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Added to the Dr.Web virus database: 2011-07-01

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'winupdater' = 'C:\Windupdt\winupdate.exe'
  • [<HKLM>\Software\Microsoft\Windows NT\CurrentVersion\Winlogon] 'UserInit' = '<SYSTEM32>\userinit.exe,C:\Windupdt\winupdate.exe'
Malicious functions
To bypass firewall, removes or modifies the following registry keys
  • [<HKLM>\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
  • Windows Security Center
blocks the following features:
  • User Account Control (UAC)
  • Windows Security Center
Injects code into
the following system processes:
  • %WINDIR%\syswow64\explorer.exe
  • %WINDIR%\syswow64\notepad.exe
Modifies file system
Creates the following files
  • %TEMP%\crypted.exe
  • C:\windupdt\winupdate.exe
Network activity
Connects to
  • '':999
  • '':99
  • '':81
  • 'localhost':81
  • 'localhost':99
  • 'localhost':999
Searches for the following windows
  • ClassName: '#32770' WindowName: 'Program Manager'
  • ClassName: '#32770' WindowName: ''
Creates and executes the following
  • '%TEMP%\crypted.exe'
  • '%WINDIR%\syswow64\notepad.exe' ' (with hidden window)
Executes the following
  • '%WINDIR%\syswow64\notepad.exe'
  • '%WINDIR%\syswow64\explorer.exe'
The Russian developer of Dr.Web anti-viruses
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Doctor Web is the Russian developer of Dr.Web anti-virus software. Dr.Web anti-virus software has been developed since 1992.

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