Win32.HLLW.Autoruner1.28373

Added to the Dr.Web virus database: 2012-10-20

Virus description added: 2012-10-20

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '%WINDIR%\Tsvchost.exe' = '%WINDIR%\Tsvchost.exe'

Creates the following files on removable media:

Malicious functions:

To bypass firewall, removes or modifies the following registry keys:

[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '<SYSTEM32>\ftp.exe' = '<SYSTEM32>\ftp.exe:*:Enabled:Windows Update'
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\Tsvchost.exe' = '%WINDIR%\Tsvchost.exe:*:Enabled:Windows Update'

To complicate detection of its presence in the operating system,

blocks execution of the following system utilities:

Creates and executes the following:

Executes the following:

<SYSTEM32>\reg.exe ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System\ /v "DisableRegistryTools" /t REG_DWORD /d 1 /f
<SYSTEM32>\reg.exe ADD HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "<SYSTEM32>\ftp.exe" /d "<SYSTEM32>\ftp.exe:*:Enabled:Windows Update" /f
<SYSTEM32>\reg.exe ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System\ /v "DisableTaskmgr" /t REG_DWORD /d 1 /f
<SYSTEM32>\reg.exe ADD HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v "%WINDIR%\Tsvchost.exe" /d "%WINDIR%\Tsvchost.exe:*:Enabled:Windows Update" /f
<SYSTEM32>\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v "%WINDIR%\Tsvchost.exe" /t REG_SZ /d "%WINDIR%\Tsvchost.exe" /f

Modifies file system :

Creates the following files:

Sets the 'hidden' attribute to the following files:

Deletes the following files:

Miscellaneous:

Searches for the following windows: