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Win32.HLLW.Autoruner.51107

Added to the Dr.Web virus database: 2011-06-04

Virus description added:

Technical Information

To ensure autorun and distribution
Modifies the following registry keys
  • [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '<File name>.exe' = '%APPDATA%\<File name>.exe'
Creates or modifies the following files
  • %APPDATA%\microsoft\windows\start menu\programs\startup\fjefq.exe
Creates the following files on removable media
  • <Drive name for removable media>:\fjefq.exe
  • <Drive name for removable media>:\autorun.inf
Malicious functions
To bypass firewall, removes or modifies the following registry keys
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\javax.exe' = '%APPDATA%\javax.exe:*:Enabled:Windows Mess...
  • [<HKLM>\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\ctfmon.exe' = '%APPDATA%\ctfmon.exe:*:Enabled:Windows Me...
Injects code into
the following user processes:
  • ctfmon.exe
Modifies file system
Creates the following files
  • %APPDATA%\ctfmon.exe
  • %TEMP%\zp9t_1vu.0.cs
  • %TEMP%\zp9t_1vu.cmdline
  • %TEMP%\zp9t_1vu.out
  • %TEMP%\csc8f75.tmp
  • %TEMP%\res8f95.tmp
  • %TEMP%\zp9t_1vu.dll
  • %APPDATA%\<File name>.exe
  • %APPDATA%\javax.exe
  • %APPDATA%\data.dat
Sets the 'hidden' attribute to the following files
  • <Drive name for removable media>:\fjefq.exe
  • <Drive name for removable media>:\autorun.inf
Deletes the following files
  • %TEMP%\res8f95.tmp
  • %TEMP%\csc8f75.tmp
  • %TEMP%\zp9t_1vu.out
  • %TEMP%\zp9t_1vu.cmdline
  • %TEMP%\zp9t_1vu.dll
  • %TEMP%\zp9t_1vu.0.cs
Network activity
UDP
  • DNS ASK ja#####veby.no-ip.org
Miscellaneous
Creates and executes the following
  • '%APPDATA%\ctfmon.exe'
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\csc.exe' /noconfig /fullpaths @"%TEMP%\zp9t_1vu.cmdline"' (with hidden window)
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES8F95.tmp" "%TEMP%\CSC8F75.tmp"' (with hidden window)
  • '%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%\ctfmon.exe" /t REG_SZ /d "%APPDATA%\ctfmon.exe...' (with hidden window)
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\javax.exe" /t REG_SZ /d "%APPDATA%\javax.exe:*...' (with hidden window)
Executes the following
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\csc.exe' /noconfig /fullpaths @"%TEMP%\zp9t_1vu.cmdline"
  • '%WINDIR%\microsoft.net\framework\v2.0.50727\cvtres.exe' /NOLOGO /READONLY /MACHINE:IX86 "/OUT:%TEMP%\RES8F95.tmp" "%TEMP%\CSC8F75.tmp"
  • '%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%\ctfmon.exe" /t REG_SZ /d "%APPDATA%\ctfmon.exe...
  • '%WINDIR%\syswow64\cmd.exe' /c REG ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\javax.exe" /t REG_SZ /d "%APPDATA%\javax.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%\javax.exe" /t REG_SZ /d "%APPDATA%\javax.exe:*:Enable...
  • '%WINDIR%\syswow64\reg.exe' ADD HKLM\System\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%APPDATA%\ctfmon.exe" /t REG_SZ /d "%APPDATA%\ctfmon.exe:*:Enab...
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