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Win32.Xpaj.4

Added to the Dr.Web virus database: 2012-09-18

Virus description added:

Technical Information

To ensure autorun and distribution:
Substitutes the following executable system files:
  • <SYSTEM32>\jgsd400.dll with %TEMP%\C.tmp
  • <SYSTEM32>\vfp9t.dll with %TEMP%\A.tmp
  • <SYSTEM32>\jgsh400.dll with %TEMP%\10.tmp
  • <SYSTEM32>\libisc.dll with %TEMP%\E.tmp
  • <SYSTEM32>\libxml2.dll with %TEMP%\4.tmp
  • <SYSTEM32>\mapistub.dll with %TEMP%\2.tmp
  • <SYSTEM32>\xpsshhdr.dll with %TEMP%\8.tmp
  • <SYSTEM32>\ir41_qcx.dll with %TEMP%\6.tmp
Modifies master boot record (MBR).
Malicious functions:
Creates and executes the following:
  • %TEMP%\WLXPL.exe \444x
Modifies file system :
Creates the following files:
  • %TEMP%\WLXPL.exe
  • %WINDIR%\udeqp.bcx
  • %TEMP%\WLXPhotoLibraryMain.dll
Deletes the following files:
  • %TEMP%\D.tmp
  • %TEMP%\B.tmp
  • %TEMP%\11.tmp
  • %TEMP%\F.tmp
  • %TEMP%\5.tmp
  • %TEMP%\3.tmp
  • %TEMP%\9.tmp
  • %TEMP%\7.tmp
Moves the following system files:
  • from <SYSTEM32>\jgsd400.dll to %TEMP%\D.tmp
  • from <SYSTEM32>\vfp9t.dll to %TEMP%\B.tmp
  • from <SYSTEM32>\jgsh400.dll to %TEMP%\11.tmp
  • from <SYSTEM32>\libisc.dll to %TEMP%\F.tmp
  • from <SYSTEM32>\libxml2.dll to %TEMP%\5.tmp
  • from <SYSTEM32>\mapistub.dll to %TEMP%\3.tmp
  • from <SYSTEM32>\xpsshhdr.dll to %TEMP%\9.tmp
  • from <SYSTEM32>\ir41_qcx.dll to %TEMP%\7.tmp
Moves itself:
  • from <Full path to virus> to %TEMP%\1.tmp
Miscellaneous:
Searches for the following windows:
  • ClassName: 'ajfngaajf' WindowName: 'k'