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Profil

Win32.HLLW.Autoruner1.10525

Added to the Dr.Web virus database: 2012-01-03

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Windows] 'AppInit_DLLs' = '%PROGRAM_FILES%\Internet Explorer\iedwup.dll'
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\Messenger] 'Start' = '00000002'
Malicious functions:
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
  • file extensions
Executes the following:
  • <SYSTEM32>\sc.exe start Messenger
  • <SYSTEM32>\rundll32.exe <SYSTEM32>\msgsvck.dll Install
Modifies file system :
Creates the following files:
  • <SYSTEM32>\trp.dll
  • <SYSTEM32>\vrs.dll
  • <SYSTEM32>\msgsvck.dll
  • %PROGRAM_FILES%\Internet Explorer\iedwup.dll
Sets the 'hidden' attribute to the following files:
  • <SYSTEM32>\trp.dll
  • <SYSTEM32>\vrs.dll
  • <SYSTEM32>\msgsvck.dll
  • %PROGRAM_FILES%\Internet Explorer\iedwup.dll
Miscellaneous:
Searches for the following windows:
  • ClassName: '' WindowName: ''