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Win32.HLLW.Autoruner2.16177

Added to the Dr.Web virus database: 2014-07-17

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'd3a537f9cd542c1252a93ac24fcd431a' = '"%TEMP%\systaem.exe" ..'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'd3a537f9cd542c1252a93ac24fcd431a' = '"%TEMP%\systaem.exe" ..'
Creates or modifies the following files:
  • %HOMEPATH%\Start Menu\Programs\Startup\d3a537f9cd542c1252a93ac24fcd431a.exe
Creates the following files on removable media:
  • <Drive name for removable media>:\d3a537f9cd542c1252a93ac24fcd431a.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\systaem.exe' = '%TEMP%\systaem.exe:*:Enabled:systaem.exe'
Creates and executes the following:
  • '%TEMP%\systaem.exe'
  • '%HOMEPATH%\Local Settings\Tempserver.exe'
Executes the following:
  • '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\systaem.exe" "systaem.exe" ENABLE
Modifies file system :
Creates the following files:
  • %TEMP%\systaem.exe
  • %HOMEPATH%\Local Settings\Tempserver.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\d3a537f9cd542c1252a93ac24fcd431a.exe
Network activity:
Connects to:
  • 'ch#####a1996.linkpc.net':288
UDP:
  • DNS ASK ch#####a1996.linkpc.net
Miscellaneous:
Searches for the following windows:
  • ClassName: 'Indicator' WindowName: '(null)'
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