Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'f5ac7c069b9e6b412c43f7ea38d34f76' = '"%TEMP%\csrs.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'f5ac7c069b9e6b412c43f7ea38d34f76' = '"%TEMP%\csrs.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\f5ac7c069b9e6b412c43f7ea38d34f76.exe
Creates the following files on removable media:
- <Drive name for removable media>:\f5ac7c069b9e6b412c43f7ea38d34f76.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%TEMP%\csrs.exe' = '%TEMP%\csrs.exe:*:Enabled:csrs.exe'
Creates and executes the following:
- '%TEMP%\csrs.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%TEMP%\csrs.exe" "csrs.exe" 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
- %TEMP%\csrs.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\f5ac7c069b9e6b412c43f7ea38d34f76.exe
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:
- 'di####8.no-ip.biz':81
UDP:
- DNS ASK di####8.no-ip.biz
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: '(null)'