W32/Sdbot-MV

Please follow the instructions for removing worms.

Change any data that may have become compromised.

Delete the file keylog.txt in the Windows folder if it exists.

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\
Microsoft Synchronization Manager = alien.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Microsoft Synchronization Manager = alien.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\Microsoft Synchronization Manager = alien.exe

and delete it if it exists.

Close the registry editor.

W32/Sdbot-MV is an IRC backdoor Trojan and network worm.

W32/Sdbot-MV copies itself to network shares protected by weak passwords.

When first run W32/Sdbot-MV copies itself to the Windows system folder as alien.exe and creates the following registry entries to ensure it is run at system logon:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Microsoft Synchronization Manager = alien.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Microsoft Synchronization Manager = alien.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Microsoft Synchronization Manager = alien.exe

Each time W32/Sdbot-MV is run it attempts to connect to a remote IRC server
and join a specific channel. The worm then runs in the background allowing a remote intruder to issue commands which control the computer via IRC channels.
Commands include downloading and executing remote files.

The worm also logs keystrokes to the file keylog.txt created in the Windows system folder. This file is not malicious and can be deleted.