Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '1c77b7000b13265fa366252ad9e72081' = '"%TEMP%\rundll.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '1c77b7000b13265fa366252ad9e72081' = '"%TEMP%\rundll.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\1c77b7000b13265fa366252ad9e72081.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\rundll.exe' = '%TEMP%\rundll.exe:*:Enabled:rundll.exe'
Creates and executes the following:
- '%TEMP%\rundll.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\rundll.exe" "rundll.exe" ENABLE
Modifies file system :
Creates the following files:
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.new
- %APPDATA%\Microsoft\CLR Security Config\v2.0.50727.42\security.config.cch.new
- %TEMP%\rundll.exe
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.new
Deletes the following files:
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.2904.180781
- %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.2904.180781
Moves the following files:
- from %APPDATA%\Microsoft\CLR Security Config\v2.0.50727.42\security.config.cch.new to %APPDATA%\Microsoft\CLR Security Config\v2.0.50727.42\security.config.cch
- from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\enterprisesec.config.cch.2904.180781
- from %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch to %WINDIR%\Microsoft.NET\Framework\v2.0.50727\CONFIG\security.config.cch.2904.180781
- 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
- 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
Network activity:
Connects to:
- 'ya####zer.no-ip.biz':1177
UDP:
- DNS ASK ya####zer.no-ip.biz
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'
