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Win32.HLLP.Siggen.25

Added to the Dr.Web virus database: 2012-01-06

Virus description added:

Technical Information

To ensure autorun and distribution:
Infects the following executable system files:
  • <SYSTEM32>\dllcache\spoolsv.exe
Substitutes the following executable system files:
  • <SYSTEM32>\spoolsv.exe with <SYSTEM32>\spoolsv.exe
Malicious functions:
Injects code into
the following system processes:
  • %WINDIR%\Explorer.EXE
  • <SYSTEM32>\services.exe
Modifies file system :
Moves the following system files:
  • from <SYSTEM32>\spoolsv.exe to <SYSTEM32>\_@2006.tmp
Moves itself:
  • from <Full path to virus> to <SYSTEM32>\_@tmp1983.tmp