Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] '"%TEMP%\ayvv.exe"' = '"%TEMP%\ayvv.exe"'
Creates or modifies the following files:
- %WINDIR%\Tasks .scr
- %ALLUSERSPROFILE%\Start Menu\Programs\Startup .scr
Creates the following files on removable media:
- <Drive name for removable media>:\win7~.exe
- <Drive name for removable media>:\autorun.inf
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '"%TEMP%\ayvv.exe"' = '"%TEMP%\ayvv.exe:*:Enabled:Windows" Update'
To complicate detection of its presence in the operating system,
forces the system hide from view:
- hidden files
- file extensions
Executes the following:
- <SYSTEM32>\reg.exe ADD HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run /v ""%TEMP%\ayvv.exe"" /t REG_SZ /d ""%TEMP%\ayvv.exe"" /f
- <SYSTEM32>\reg.exe ADD HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List /v ""%TEMP%\ayvv.exe"" /d ""%TEMP%\ayvv.exe":*:Enabled:Windows Update" /f
- <SYSTEM32>\reg.exe ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /V HideFileExt /T REG_DWORD /D 00000001 /F
- <SYSTEM32>\reg.exe ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /V Hidden /T REG_DWORD /D 00000002 /F
- <SYSTEM32>\reg.exe ADD HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced /V ShowSuperHidden /T REG_DWORD /D 00000000 /F
Modifies file system :
Creates the following files:
- %WINDIR%\msapps .scr
- %WINDIR%\mui .scr
- %WINDIR%\Microsoft.NET .scr
- %WINDIR%\msagent .scr
- %WINDIR%\OemDir .scr
- %WINDIR%\PeerNet .scr
- %WINDIR%\Prefetch .scr
- %WINDIR%\Offline Web Pages .scr
- %WINDIR%\pchealth .scr
- %WINDIR%\Fonts .scr
- %WINDIR%\Help .scr
- %WINDIR%\Driver Cache .scr
- %WINDIR%\ehome .scr
- %WINDIR%\ime .scr
- %WINDIR%\java .scr
- %WINDIR%\Media .scr
- %WINDIR%\inf .scr
- %WINDIR%\Installer .scr
- %WINDIR%\Temp .scr
- %WINDIR%\twain_32 .scr
- <SYSTEM32> .scr
- <Auxiliary element>
- %WINDIR%\Web .scr
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\ct[1].php
- %TEMP%\ct_6$
- %WINDIR%\WinSxS .scr
- %WINDIR%\<Auxiliary name> .scr
- %WINDIR%\Registration .scr
- %WINDIR%\repair .scr
- %WINDIR%\Provisioning .scr
- %WINDIR%\pss .scr
- %WINDIR%\Resources .scr
- %WINDIR%\srchasst .scr
- %WINDIR%\system .scr
- %WINDIR%\security .scr
- %WINDIR%\SoftwareDistribution .scr
- %WINDIR%\Downloaded Program Files .scr
- %PROGRAM_FILES%\Microsoft.NET .scr
- %PROGRAM_FILES%\Movie Maker .scr
- %PROGRAM_FILES%\Messenger .scr
- %PROGRAM_FILES%\microsoft frontpage .scr
- %PROGRAM_FILES%\MSBuild .scr
- %PROGRAM_FILES%\MSXML 6.0 .scr
- %PROGRAM_FILES%\NetMeeting .scr
- %PROGRAM_FILES%\MSN .scr
- %PROGRAM_FILES%\MSN Gaming Zone .scr
- %ALLUSERSPROFILE%\Start Menu\Programs\Accessories .scr
- %ALLUSERSPROFILE%\Start Menu\Programs\Administrative Tools .scr
- %TEMP%\ayvv.exe
- %HOMEPATH%\Start Menu\Programs .scr
- %ALLUSERSPROFILE%\Start Menu\Programs\Games .scr
- %PROGRAM_FILES%\FireFox .scr
- %PROGRAM_FILES%\Internet Explorer .scr
- %CommonProgramFiles% .scr
- %PROGRAM_FILES%\ComPlus Applications .scr
- %WINDIR%\addins .scr
- %WINDIR%\AppPatch .scr
- %WINDIR%\$MSI31Uninstall_KB893803v2$ .scr
- %WINDIR%\$NtUninstallWIC$ .scr
- %WINDIR%\assembly .scr
- %WINDIR%\Cursors .scr
- %WINDIR%\Debug .scr
- %WINDIR%\Config .scr
- %WINDIR%\Connection Wizard .scr
- %PROGRAM_FILES%\Reference Assemblies .scr
- %PROGRAM_FILES%\Uninstall Information .scr
- %PROGRAM_FILES%\Online Services .scr
- %PROGRAM_FILES%\Outlook Express .scr
- %PROGRAM_FILES%\Windows Media Player .scr
- %PROGRAM_FILES%\xerox .scr
- %PROGRAM_FILES%\<Auxiliary name> .scr
- %PROGRAM_FILES%\Windows NT .scr
- %PROGRAM_FILES%\WindowsUpdate .scr
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\win7~.exe
- <Drive name for removable media>:\autorun.inf
Network activity:
Connects to:
- 'ay##.6te.net':80
- 'localhost':1035
TCP:
HTTP GET requests:
- ay##.6te.net/hr/ct.php?s=#############################
UDP:
- DNS ASK ay##.6te.net
Miscellaneous:
Searches for the following windows:
- ClassName: 'MS_WINHELP' WindowName: ''
