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Win32.HLLW.Autoruner1.35736

Added to the Dr.Web virus database: 2013-04-26

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Topology Desktop Remote Disk Thread' = '<SYSTEM32>\mhtoeyknykb.exe'
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\CNG PC Source Firewall Access] 'Start' = '00000002'
Malicious functions:
To complicate detection of its presence in the operating system,
blocks the following features:
  • Windows Security Center
Creates and executes the following:
  • '%WINDIR%\Temp\enclrj5wv7lbaz.exe' -r 24649 tcp
  • '%WINDIR%\Temp\enclrj70jklbaz.exe' -r 33957 tcp
  • '<SYSTEM32>\fvoyafoxuj.exe' "<SYSTEM32>\mhtoeyknykb.exe"
  • '%TEMP%\enclrj4xp4lbaxdruogw.exe'
  • '<SYSTEM32>\mhtoeyknykb.exe'
Modifies file system :
Creates the following files:
  • <SYSTEM32>\vswbdiotokhmln\run
  • <SYSTEM32>\vswbdiotokhmln\rng
  • <SYSTEM32>\vswbdiotokhmln\cfg
  • %WINDIR%\Temp\enclrj70jklbaz.exe
  • %WINDIR%\Temp\enclrj5wv7lbaz.exe
  • %TEMP%\enclrj4xp4lbaxdruogw.exe
  • <SYSTEM32>\vswbdiotokhmln\tst
  • <SYSTEM32>\vswbdiotokhmln\etc
  • <SYSTEM32>\fvoyafoxuj.exe
  • <SYSTEM32>\mhtoeyknykb.exe
Sets the 'hidden' attribute to the following files:
  • <SYSTEM32>\fvoyafoxuj.exe
  • <SYSTEM32>\mhtoeyknykb.exe
Deletes the following files:
  • %WINDIR%\Temp\enclrj5wv7lbaz.exe
  • %WINDIR%\Temp\enclrj70jklbaz.exe
  • <DRIVERS>\etc\hosts
  • %TEMP%\enclrj4xp4lbaxdruogw.exe
Substitutes the HOSTS file.
Network activity:
Connects to:
  • 'pa####ciostit.com':80
  • 'ka####tixter.com':80
  • 've####tistic.com':80
  • 'jo###ryta.com':80
  • 'gr####oholist.com':80
  • 'gj####vcaouy.com':80
TCP:
HTTP GET requests:
  • pa####ciostit.com/so31/isup.php?v=###################
  • ka####tixter.com/so31/isup.php?v=###################
  • ve####tistic.com/so31/isup.php?v=###################
  • jo###ryta.com/so31/isup.php?v=###################
  • gr####oholist.com/so31/isup.php?v=###################
  • gj####vcaouy.com/so31/isup.php?v=###################
UDP:
  • DNS ASK fa######pulepunctcom.com
  • DNS ASK ge#####alixtentop.com
  • DNS ASK ka####tixter.com
  • DNS ASK af####chmonitor.com
  • DNS ASK ja###uter.com
  • DNS ASK wa####rbulldog.com
  • DNS ASK gr####oholist.com
  • DNS ASK jo###ryta.com
  • DNS ASK gj####vcaouy.com
  • DNS ASK ve####tistic.com
  • DNS ASK pa####ciostit.com
  • '23#.#55.255.250':1900
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