Sophos

W32/Rbot-GVH

Aliases
  • W32/Sdbot.worm.gen.ax
  • Backdoor.Win32.Rbot.dyl
Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Installs itself in the registry
Protection available since 20 November 2007 02:44:45 (GMT)
Detected by All Sophos products
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Action

More Information

W32/Rbot-GVH is a worm for the Windows platform.

W32/Rbot-GVH includes functionality to access the internet and communicate with a remote server via HTTP.

When first run W32/Rbot-GVH copies itself to <System>\svdhost.exe and creates the following files:

<System>\drivers\npf.sys
<System>\packet.dll
<System>\wpcap.dll

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

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft Updates
svdhost.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Updates
svdhost.exe

The file npf.sys is registered as a new system driver service named "NPF", with a display name of "Netgroup Packet Filter". Registry entries are created under:

HKLM\SYSTEM\CurrentControlSet\Services\NPF

Registry entries are set as follows:

HKCU\Software\Microsoft\OLE
Microsoft Updates
svdhost.exe

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

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