high
Summary
Summary
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| Detected by | All Sophos products |
|---|---|
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Action
- Summary
- Action
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Please follow the instructions for removing worms.
Please follow the instructions for removing worms.
Windows NT/2000/XP
In Windows NT/2000/XP you will also need to edit the following registry entry for each user who ran the virus. The removal of this entry is optional in Windows 95/98/Me. Please read the warning about editing the registry.
At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.
Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export Range' panel, click 'All', then save your registry as Backup.
Each user has a registry area named HKEY_USERS\[code number indicating user]\. For each user locate the entry:
HKU\[code number]\Software\Microsoft\Windows\CurrentVersion\Run\
rdvs = C:\windows\rrddvvss.exe
and delete it if it exists.
Close the registry editor and reboot your computer.
More Information
W32/Ultimx-B is an internet worm which spreads to shared Startup folders located at randomly chosen IP addresses. The worm also installs a premium rate Webdialler program.
When first run the worm moves itself to <Windows>\rrddvvss.exe, drops the text file <Windows>\rrddvvssc.dll, drops and runs the dialler program <WINDOWS>\sddlr.exe and creates the following registry entry so that the worm is run automatically each time the machine is restarted:
HKCU\Software\Microsoft\Windows\CurrentVersion\Run\rdvs = C:\windows\rrddvvss.exe
W32/Ultimx-B runs continuously in the background trying to connect to randomly generated IP addresses and when it establishes a connection it tries to copy itself to any of the following Startup folders that have full share access (that are writeable):
\Windows\Start menu\Programs\Startup\
\Documents and settings\Default user\Start Menu\Programs\Startup\
\Start menu\Programs\Startup\
\Windows\Startmenu\Programme\Autostart\
\Windows\Menu Avvio\Programmi\Esecuzione Automatica\
\Windows\Menu Iniciar\Programas\Iniciar\
\Windows\Start-menyn\Program\Autostart\
\Windows\Menu Dumarrer\Programmes\Dumarrage\
\Windows\Menuen Start\Programmer\Start\
\Windows\Menu Start\Programy\Autostart\
\Win98\Start Menu\Programs\Startup\
\Win95\Start Menu\Programs\Startup\
\Win98\Startmenu\Programme\Autostart\
\Win95\Startmenu\Programme\Autostart\
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