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Win32.HLLW.Autoruner2.16306
Added to the Dr.Web virus database:
2014-07-21
Virus description added:
2014-07-22
Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'ec686f5c138c7c8cebb305f8405ceb51' = '"%APPDATA%\avchost.com" ..'
[<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'ec686f5c138c7c8cebb305f8405ceb51' = '"%APPDATA%\avchost.com" ..'
Creates or modifies the following files:
%HOMEPATH%\Start Menu\Programs\Startup\ec686f5c138c7c8cebb305f8405ceb51.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
[<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\avchost.com' = '%APPDATA%\avchost.com:*:Enabled:avchost.com'
Creates and executes the following:
Executes the following:
'<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\avchost.com" "avchost.com" ENABLE
Modifies file system :
Creates the following files:
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new
%WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new
%APPDATA%\avchost.com
Moves the following files:
from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch
from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch
Network activity:
Connects to:
'da####dl.no-ip.biz':8888
UDP:
DNS ASK da####dl.no-ip.biz
Miscellaneous:
Searches for the following windows:
ClassName: 'Indicator' WindowName: '(null)'
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