Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] 'winupdater' = 'C:\Windupdt\winupdate.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon] 'UserInit' = '<SYSTEM32>\userinit.exe,C:\Windupdt\winupdate.exe'
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'wextract_cleanup0' = 'rundll32.exe <SYSTEM32>\advpack.dll,DelNodeRunDLL32 ""%TEMP%\IXP000.TMP\""'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
To complicate detection of its presence in the operating system,
blocks the following features:
- User Account Control (UAC)
Injects code into
the following system processes:
- %WINDIR%\Explorer.EXE
Installs hooks to intercept notifications
on keystrokes:
- Handler for the 'winupdate.exe' process: C:\Windupdt\winupdate.exe
Modifies file system :
Creates the following files:
- C:\Windupdt\winupdate.exe
- %TEMP%\IXP000.TMP\teste.exe
- %TEMP%\IXP000.TMP\XBOX36~1.EXE
Sets the 'hidden' attribute to the following files:
- C:\Windupdt\winupdate.exe
Network activity:
Connects to:
- 'localhost':1604
Miscellaneous:
Searches for the following windows:
- ClassName: 'shell_traywnd' WindowName: ''
- ClassName: 'Indicator' WindowName: ''
