Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'a5b7d1732258aca92064ed82c9f4dd20' = '"%APPDATA%\rundll32.exe" ..'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'a5b7d1732258aca92064ed82c9f4dd20' = '"%APPDATA%\rundll32.exe" ..'
Creates or modifies the following files:
- %HOMEPATH%\Start Menu\Programs\Startup\a5b7d1732258aca92064ed82c9f4dd20.exe
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%APPDATA%\rundll32.exe' = '%APPDATA%\rundll32.exe:*:Enabled:rundll32.exe'
Creates and executes the following:
- '%APPDATA%\rundll32.exe'
- '%APPDATA%\Setup.exe'
Executes the following:
- '<SYSTEM32>\netsh.exe' firewall add allowedprogram "%APPDATA%\rundll32.exe" "rundll32.exe" ENABLE
- '<SYSTEM32>\rundll32.exe' <SYSTEM32>\shimgvw.dll,ImageView_Fullscreen %APPDATA%\66672_ss.jpg
Modifies file system :
Creates the following files:
- %APPDATA%\rundll32.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
- %HOMEPATH%\Recent\Application Data.lnk
- %APPDATA%\Setup.exe
- %APPDATA%\66672_ss.jpg
- %HOMEPATH%\Recent\66672_ss.lnk
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:
- 'ad#####ta7t.no-ip.biz':5552
UDP:
- DNS ASK ad#####ta7t.no-ip.biz
Miscellaneous:
Searches for the following windows:
- ClassName: 'ShImgVw:CPreviewWnd' WindowName: '(null)'
- ClassName: 'Indicator' WindowName: '(null)'
- ClassName: 'EDIT' WindowName: '(null)'
- ClassName: 'Shell_TrayWnd' WindowName: '(null)'