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Win32.HLLW.Autoruner1.12107

Added to the Dr.Web virus database: 2012-02-16

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKLM>\SOFTWARE\Wow6432Node\Microsoft\Active Setup\Installed Components\{EAB2DD6B-4C1F-EC88-CC27-A7ABA5BEBEB7}] 'StubPath' = '%APPDATA%\local.exe'
  • [<HKCU>\SOFTWARE\Microsoft\Active Setup\Installed Components\{EAB2DD6B-4C1F-EC88-CC27-A7ABA5BEBEB7}] 'StubPath' = '%APPDATA%\local.exe'
Creates the following files on removable media
  • <Drive name for removable media>:\cryptedfile.exe
  • <Drive name for removable media>:\autorun.ini
Malicious functions
To bypass firewall, removes or modifies the following registry keys
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\CryptedFile.exe' = '%TEMP%\CryptedFile.exe:*:Enabled:Window...
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\local.exe' = '%APPDATA%\local.exe:*:Enabled:Windows Mess...
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
Modifies file system
Creates the following files
  • %TEMP%\cryptedfile.exe
  • %APPDATA%\local.exe
Sets the 'hidden' attribute to the following files
  • <Drive name for removable media>:\cryptedfile.exe
  • <Drive name for removable media>:\autorun.ini
Network activity
UDP
  • DNS ASK si#####elnis1.no-ip.org
Miscellaneous
Creates and executes the following
  • '%TEMP%\cryptedfile.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 "%TEMP%\CryptedFile.exe" /t REG_SZ /d "%TEMP%\CryptedFile...' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\local.exe" /t REG_SZ /d "%APPDATA%\local.exe:*...' (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 "%TEMP%\CryptedFile.exe" /t REG_SZ /d "%TEMP%\CryptedFile...
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\local.exe" /t REG_SZ /d "%APPDATA%\local.exe:*...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%TEMP%\CryptedFile.exe" /t REG_SZ /d "%TEMP%\CryptedFile.exe:*:...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\local.exe" /t REG_SZ /d "%APPDATA%\local.exe:*:Enable...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
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