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:
- '%APPDATA%\avchost.com'
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)'
