Sophos

W32/Rbot-LD

Aliases
  • Backdoor.Win32.Rbot.bf
  • W32/Sdbot.worm.gen.x
  • WORM_RBOT.MW
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 4 October 2004 07:56:34 (GMT)
Last updated 30 March 2005 16:32:05 (GMT)
Detected by All Sophos products
  • Endpoint Security and Control 9.0
  • Small business solutions 4.0

Action

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.

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.

More Information

W32/Rbot-LD is a worm which attempts to spread to remote network shares and allows unauthorised remote access to the computer via IRC channels. W32/Rbot-LD is a worm which attempts to spread to remote network shares and allows unauthorised remote access to the computer via IRC channels.

W32/Rbot-LD spreads to network shares with weak passwords and via network security exploits as a result of the backdoor Trojan element receiving the appropriate command from a remote user.

W32/Rbot-LD copies itself to the file spools.exe in the Windows system folder and creates entries at the following locations in the registry so that the worm is run when a user logs on to Windows:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Print Spooler = spools.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
Print Spooler = spools.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Print Spooler = spools.exe

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