W32/Sdbot-ZN

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.

Close the registry editor.

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

W32/Sdbot-ZN runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.

W32/Sdbot-ZN spreads by copying itself to network shares.

When first run W32/Sdbot-ZN copies itself to <System>\wdfmrg.exe.

The following registry entries are created to run wdfmrg.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Windows User Mode Driver Manager
wdfmrg.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Windows User Mode Driver Manager
wdfmrg.exe

W32/Sdbot-ZN includes functionality to:

- carry out DDoS flooder attacks
- provide a proxy server
- silently download, install and run new software, including updates of its software, 3rd party software and other malicious executables
- uninstall itself