Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '125d3f6ae0a53efa91122391603b15de' = '"%TEMP%\Winrar.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '125d3f6ae0a53efa91122391603b15de' = '"%TEMP%\Winrar.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\125d3f6ae0a53efa91122391603b15de.exe
Creates the following files on removable media:
- <Drive name for removable media>:\125d3f6ae0a53efa91122391603b15de.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\Winrar.exe' = '%TEMP%\Winrar.exe:*:Enabled:Winrar.exe'
Creates and executes the following:
- '%TEMP%\Winrar.exe'
- 'C:\Extracted\Server00.packed.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\Winrar.exe" "Winrar.exe" ENABLE
Modifies file system :
Creates the following files:
- %TEMP%\Winrar.exe
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new
- %TEMP%\sfx.ini
- C:\Extracted\HVMRuntm.dll
- C:\Extracted\Server00.packed.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\125d3f6ae0a53efa91122391603b15de.exe
Deletes the following files:
- %TEMP%\sfx.ini
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:
- 'fa####2.no-ip.biz':99
UDP:
- DNS ASK Fa####2.no-ip.biz
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
