W32/Rbot-UG

Please follow the instructions for removing worms.

Change any data that may have become compromised.

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/Rbot-UG is a network worm with backdoor Trojan functionality for the Windows platform.

The worm copies itself to a file named wmsvc.exe in the Windows system folder and creates the following registry entries:

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\Run
*wuauclt.exe
wmsvc.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
*wuauclt.exe
wmsvc.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
*wuauclt.exe
wmsvc.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
*wuauclt.exe
wmsvc.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\policies\Explorer\Run
*wuauclt.exe
wmsvc.exe

W32/Rbot-UG spreads using a variety of techniques including exploiting weak passwords on computers and SQL servers, exploiting operating system vulnerabilities (including DCOM-RPC, LSASS, WebDAV and UPNP) and using backdoors opened by other worms or Trojans.

W32/Rbot-UG can be controlled by a remote attacker over IRC channels. The backdoor component of W32/Rbot-UG can be instructed by a remote user to perform the following functions:

• start an FTP server
• start a Proxy server
• start a web server
• take part in distributed denial of service (DDoS) attacks
• log keypresses
• capture screen/webcam images
• packet sniffing
• port scanning
• download/execute arbitrary files
• start a remote shell (RLOGIN)
• steal product registration information from certain software

Patches for the operating system vulnerabilities exploited by W32/Rbot-UG can be obtained from Microsoft at:

http://www.microsoft.com/technet/security/bulletin/ms04-012.mspx
http://www.microsoft.com/technet/security/bulletin/ms03-039.mspx
http://www.microsoft.com/technet/security/bulletin/ms03-007.mspx
http://www.microsoft.com/technet/security/bulletin/ms01-059.mspx