W32/Sdbot-DV

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 entry:

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
RandomWin32 = mgnwin32.exe

and delete it if it exists.

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\RandomWin32 = mgnwin32.exe

and delete it if it exists.

Close the registry editor.

W32/Sdbot-DV is a backdoor Trojan and network aware worm which runs in the background as a service process and allows unauthorised remote access to the computer via IRC channels.

W32/Sdbot-DV copies itself to the Windows System32 folder as
MGNWIN32.EXE and creates the following registry entries so that the worm is run
when the computer restarts:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
RandomWin32 = mgnwin32.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
RandomWin32 = mgnwin32.exe

W32/Sdbot-DV remains resident, listening for commands from remote users. If the appropriate commands are received the worm will begin scanning the internet for network shares with weak administrator passwords and will attempt to copy itself to these shares.