W32/Sdbot-KB

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

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-KB is a network worm with backdoor capabilities which allows a remote intruder to access and control the computer via IRC channels.

W32/Sdbot-KB spreads over a network by copying itself to the Windows system folder of C$ and Admin$ shares with weak passwords.

Each time the worm is run it tries to connect to a remote IRC server and join a specific channel. The worm then runs in the background as a server process listening for commands to execute.

When first run the worm copies itself to the Windows system folder as WINLAB32.EXE and creates the following registry entries so that the worm runs when Windows starts up:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Security Patches = WinLab32.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Security Patches = WinLab32.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Security Patches = WinLab32.exe

W32/Sdbot-KB may also collect the CD keys of popular games that are installed on the computer.