W32/Sdbot-RP

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-RP is a member of the W32/Sdbot family of worms. It is a network worm and IRC backdoor Trojan for the Windows platform.

The worm can spread to ADMIN$ and C$ network shares with weak usernames and
passwords, and spreads over a network as a file named PengnMSN.exe.

When first run W32/Sdbot-RP copies itself to the Windows system folder with the name sdaxzl.exe. In order to run on system start the worm creates the following registry entries:

HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
vccacA
sdaxzl.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
vccacA
sdaxzl.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
vccacA
sdaxzl.exe

W32/Sdbot-RP connects to an IRC server and joins a particular channel, providing unauthorised access and control of the computer from an IRC channel. The worm can be instructed to upload/download files and execute arbitrary commands.