Sophos

W32/Rbot-GD

Aliases
  • W32/Sdbot.worm.gen.g
  • Backdoor.Rbot.gen
  • WORM_SDBOT.BX
Category
Type
What to do
Prevalence low high

Summary

 
How it spreads
  • Network shares
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Included in our products from October 2004 (3.86)
Protection available since 17 August 2004 08:20:35 (GMT)
Detected by All Sophos products

Action

Please follow the instructions for removing worms.

You will also need to edit the following registry entries, if 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\
Patches Value = WinGasys.exe
HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Patches Value = WinGasys.exe

and delete them if they exist.

Each user has a registry area named HKEY_USERS\[code number indicating user]\. For each user locate the entry:

HKCU\[code number]\Software\Microsoft\Windows\CurrentVersion\Run\
Patches Value = WinGasys.exe

and delete it if it exists.

Close the registry editor.

Check your administrator passwords and review network security.

More Information

W32/Rbot-GD is a worm which attempts to spread to remote network shares. It also contains backdoor Trojan functionality, allowing unauthorised remote access to the infected computer via IRC channels while running in the background as a service process.

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

W32/Rbot-GD moves itself to the Windows system folder as WINGASYS.EXE and creates entries in the registry at the following locations to run on system startup:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Patches Value = WinGasys.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Patches Value = WinGasys.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Patches Value = WinGasys.exe

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