Win32.HLLW.Autoruner1.63751

Added to the Dr.Web virus database: 2013-12-21

Virus description added: 2013-12-22

To ensure autorun and distribution:

Modifies the following registry keys:

[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '31a58462ee42fdbab4fd7cb329302894' = '"%APPDATA%\skype.exe" ..'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '31a58462ee42fdbab4fd7cb329302894' = '"%APPDATA%\skype.exe" ..'

Creates or modifies the following files:

Malicious functions:

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

[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\skype.exe' = '%APPDATA%\skype.exe:*:Enabled:skype.exe'

Creates and executes the following:

Executes the following:

'<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\skype.exe" "skype.exe" ENABLE

Modifies file system :

Creates the following files:

Network activity:

Connects to:

UDP:

Miscellaneous:

Searches for the following windows: