W32/SdBot-BC

Please follow the instructions for removing worms.

Check your administrator passwords and review network security.

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\
NetLogon=userint.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
NetLogon=userint.exe

and delete them if they exist.

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\NetLogon=userint.exe

and delete it if it exists.

Close the registry editor and reboot your computer.

W32/Sdbot-BC is a worm and backdoor for the Windows platform.

W32/Sdbot-BC attempts to connect to a channel on a remote IRC server and
allow a malicious user remote access to the infected computer.

When executed, W32/Sdbot-BC copies itself to the windows system folder
with the filename userint.exe.

In order to run automatically when Windows starts up W32/Sdbot-BC creates the following registry entries:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
NetLogon=userint.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
NetLogon=userint.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
NetLogon=userint.exe

W32/Sdbot-BC spreads by exploiting computers with weak passwords,
unpatched vulnerabilities and backdoors opened by other worms.