Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce] 'wextract_cleanup0' = 'rundll32.exe <SYSTEM32>\advpack.dll,DelNodeRunDLL32 "%TEMP%\IXP000.TMP\"'
Creates the following services:
- [<HKLM>\SYSTEM\ControlSet001\Services\Servar] 'Start' = '00000002'
Malicious functions:
Creates and executes the following:
- %WINDIR%\Servar.exe
- %TEMP%\IXP000.TMP\002.exe
Modifies file system :
Creates the following files:
- C:\Documents and Settings\LocalService\Favorites\Desktop.ini
- %WINDIR%\ServarKey.DLL
- %TEMP%\IXP000.TMP\002.exe
- %WINDIR%\Servar.exe
- %WINDIR%\Servar.DLL
Sets the 'hidden' attribute to the following files:
- C:\Documents and Settings\LocalService\Favorites\Desktop.ini
- %WINDIR%\ServarKey.DLL
- %WINDIR%\Servar.exe
- %WINDIR%\Servar.DLL
Deletes the following files:
- %TEMP%\IXP000.TMP\002.exe
- %WINDIR%\Servar.exe
Network activity:
Connects to:
- 'tw####3.3322.org':8000
UDP:
- DNS ASK tw####3.3322.org
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''
- ClassName: 'MS_WebcheckMonitor' WindowName: ''
- ClassName: 'MS_AutodialMonitor' WindowName: ''
