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Win32.HLLW.Autoruner1.13444

Added to the Dr.Web virus database: 2012-03-15

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'Realtek' = '%APPDATA%\explorer.exe'
Malicious functions
To bypass firewall, removes or modifies the following registry keys
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\iexplore.exe' = '%APPDATA%\iexplore.exe:*:Enabled:Window...
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\bot.exe' = '%APPDATA%\bot.exe:*:Enabled:Windows Messange...
Injects code into
the following user processes:
  • iexplore.exe
Modifies file system
Creates the following files
  • %APPDATA%\explorer.exe
  • %APPDATA%\iexplore.exe
  • %APPDATA%\bot.exe
  • %APPDATA%\info
Network activity
Connects to
  • '1h####rl.no-ip.biz':3080
UDP
  • DNS ASK ho####l.no-ip.biz
  • DNS ASK 1h####rl.no-ip.biz
Miscellaneous
Creates and executes the following
  • '%APPDATA%\iexplore.exe'
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\iexplore.exe" /t REG_SZ /d "%APPDATA%\iexplore...' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\bot.exe" /t REG_SZ /d "%APPDATA%\bot.exe:*:Ena...' (with hidden window)
Executes the following
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\iexplore.exe" /t REG_SZ /d "%APPDATA%\iexplore...
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\bot.exe" /t REG_SZ /d "%APPDATA%\bot.exe:*:Ena...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\iexplore.exe" /t REG_SZ /d "%APPDATA%\iexplore.exe:*:...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\bot.exe" /t REG_SZ /d "%APPDATA%\bot.exe:*:Enabled:Wi...