W32/Combra-A

Please follow the instructions for removing worms.

Windows NT/2000/XP/2003

In Windows NT/2000/XP/2003 you will also need to edit the following registry entry. 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.

Locate the HKEY_LOCAL_MACHINE entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
winupdateconn_
<path to executable>

and delete it if it exists.

Close the registry editor.

W32/Combra-A is an email worm with downloader Trojan capabilities.

W32/Combra-A will arrive as an HTML email message containing the following text:

Ola <Name> <email address> ,

Se amigo(a) <email address> dedicou-lhe uma musica da Radio Terra.

Para ouvir a sua musica
Clique aqui!. <fake link>

Caso o link acima esteja com problema:
Clique aqui!. <fake link>

The fake link will appear to point to a legitimate website but, if clicked upon, will take the user to a different website. At the time of writing, this website was unavailable.

When run, W32/Combra-A will attempt to display a website using Internet Explorer.

W32/Combra-A will attempt to download and run an executable from a predefined site to C:\windows\system\Explorer.EXE. At the time of writing, this file is detected by Sophos Anti-Virus as Troj/Multidr-CT.

W32/Combra-A will send out an email to a Brazilian address in order to inform a remote user that the computer has been infected. W32/Combra-A will then search the infected computer for email contacts and send an HTML email message to any addresses found.

In order to run automatically each time a user logs in, W32/Combra-A will set the following registry entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
winupdateconn_
<path to executable>