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Win32.HLLW.Autoruner.38532

Added to the Dr.Web virus database: 2010-12-19

Virus description added:

Technical Information

To ensure autorun and distribution:
Modifies the following registry keys:
  • [<HKLM>\SOFTWARE\Microsoft\Active Setup\Installed Components\{1CE3ABDC-BF64-BEFC-4DFC-0E7F63B6BDA9}] 'StubPath' = '%APPDATA%\winlogon.exe'
  • [<HKCU>\Software\Microsoft\Active Setup\Installed Components\{1CE3ABDC-BF64-BEFC-4DFC-0E7F63B6BDA9}] 'StubPath' = '%APPDATA%\winlogon.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'Policies' = '%APPDATA%\winlogon.exe'
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '<Virus name>.exe' = '%APPDATA%\sVoUr\sVoUr\0.0.0.0\<Virus name>.exe'
  • [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Policies' = '%APPDATA%\winlogon.exe'
Creates the following files on removable media:
  • <Drive name for removable media>:\Autorun.ini
  • <Drive name for removable media>:\autorun.inf
  • <Drive name for removable media>:\Crisis.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\winlogon.exe' = '%APPDATA%\winlogon.exe:*:Enabled:Windows Messanger'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe' = '%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe:*:Enabled:Windows Messanger'
  • [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
Executes the following:
  • <SYSTEM32>\reg.exe ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /t REG_SZ /d "%WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe:*:Enabled:Windows Messanger" /f
  • <SYSTEM32>\reg.exe ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\winlogon.exe" /t REG_SZ /d "%APPDATA%\winlogon.exe:*:Enabled:Windows Messanger" /f
  • %WINDIR%\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  • <SYSTEM32>\reg.exe ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile /v "DoNotAllowExceptions" /t REG_DWORD /d "0" /f
Injects code into
the following system processes:
  • %WINDIR%\Explorer.EXE
Modifies file system :
Creates the following files:
  • %APPDATA%\data.dat
  • %APPDATA%\winlogon.exe
  • %APPDATA%\sVoUr\sVoUr\0.0.0.0\<Virus name>.exe
Sets the 'hidden' attribute to the following files:
  • <Drive name for removable media>:\Crisis.exe
  • <Drive name for removable media>:\Autorun.ini
  • %APPDATA%\sVoUr\sVoUr\0.0.0.0\<Virus name>.exe
  • <Drive name for removable media>:\autorun.inf
Network activity:
Connects to:
  • 'he#####itos.no-ip.biz':3333
UDP:
  • DNS ASK he#####itos.no-ip.biz
Miscellaneous:
Searches for the following windows:
  • ClassName: 'shell_traywnd' WindowName: ''
  • ClassName: 'Indicator' WindowName: ''

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