W32/Sdbot-VQ

Please follow the instructions for removing worms.

You will also need to edit the following registry entries, if they are present. 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 entries:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices

and remove any reference to any file you deleted.

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\

and remove any reference to any file you deleted.

Close the registry editor.

W32/Sdbot-VQ is a network worm and IRC backdoor Trojan for the Windows platform.

When first run W32/Sdbot-VQ copies itself to the Windows system folder as scvhvst.exe. W32/Sdbot-VQ creates the following registry entries in order to run on user logon:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft Office Studio
scvhvst.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Office Studio
scvhvst.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft Office Studio
scvhvst.exe

The worm spreads through network shares protected by weak passwords.

The backdoor component of W32/Sdbot-VQ joins an IRC channel and awaits commands from a remote user. W32/Sdbot-VQ can then be instructed to perform tasks such as:

take part in distributed denial of service (DDoS) attacks
download/execute arbitrary files
scan networks for vulnerabilities
steal product registration keys for certain software
send email