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Win32.HLLW.Phorpiex.125

Added to the Dr.Web virus database: 2015-02-10

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'UserInit' = '<SYSTEM32>\userinit.exe,%HOMEPATH%\Documents\MSDCS\msdcs.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'MicroUpdates' = '%HOMEPATH%\Documents\MSDCS\msdcs.exe'
Malicious functions:
Creates and executes the following:
  • '%HOMEPATH%\Documents\MSDCS\msdcs.exe'
Executes the following:
  • '<SYSTEM32>\attrib.exe' "<Current directory>" +s +h
  • '<SYSTEM32>\attrib.exe' "<Full path to virus>" +s +h
  • '<SYSTEM32>\notepad.exe'
Injects code into
the following system processes:
  • <SYSTEM32>\notepad.exe
Modifies file system :
Creates the following files:
  • %HOMEPATH%\Documents\MSDCS\msdcs.exe
Sets the 'hidden' attribute to the following files:
  • <Full path to virus>
  • %HOMEPATH%\Documents\MSDCS\msdcs.exe
Deletes itself.
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: ''
  • ClassName: 'MS_WINHELP' WindowName: ''

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