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Win32.HLLW.Autoruner1.53408

Added to the Dr.Web virus database: 2013-08-09

Virus description added:

Technical Information

To ensure autorun and distribution:
Creates the following services:
  • [<HKLM>\SYSTEM\ControlSet001\Services\MediaCenter] 'Start' = '00000002'
Creates the following files on removable media:
  • <Drive name for removable media>:\jufmuj.pif
  • <Drive name for removable media>:\autorun.inf
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\Explorer.EXE' = '%WINDIR%\Explorer.EXE:*:Enabled:ipsec'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<Full path to virus>' = '<Full path to virus>:*:Enabled:ipsec'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
forces the system hide from view:
  • hidden files
blocks the following features:
  • User Account Control (UAC)
  • Windows Security Center
Executes the following:
  • '<SYSTEM32>\svchost.exe' -k krnlsrvc
Injects code into
the following system processes:
  • <SYSTEM32>\cscript.exe
a large number of user processes.
Modifies file system :
Creates the following files:
  • %TEMP%\winkrjv.exe
  • C:\autorun.inf
  • C:\clmi.exe
  • %TEMP%\kwhvay.exe
  • %TEMP%\149765_res.tmp
  • <DRIVERS>\jemtn.sys
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\jufmuj.pif
  • C:\clmi.exe
  • <SYSTEM32>\RrmytxC.dll
  • C:\autorun.inf
Deletes the following files:
  • %TEMP%\winkrjv.exe
  • %TEMP%\kwhvay.exe
  • <DRIVERS>\jemtn.sys
Moves the following files:
  • from %TEMP%\149765_res.tmp to <SYSTEM32>\RrmytxC.dll
Deletes itself.
Network activity:
Connects to:
  • 'in####ea.no-ip.org':5811
UDP:
  • DNS ASK in####ea.no-ip.org