Sophos

W32/Rbot-AGY

Aliases
  • WORM_RBOT.BOE
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 August 2005 (3.96)
Protection available since 5 July 2005 00:51:15 (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 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.

Close the registry editor.

Check the following items

  • To renable DCOM you can edit the registry, but it's better to use Dcomcnfg.exe. See Microsoft article 825750 for details.
  • The HKLM\SYSTEM\CurrentControlSet\Control\Lsa\restrictanonymous = "1" setting does not allow enumeration of SAM accounts and names. The default is "0". It can be changed in Local Security Policy. See Microsoft article 246261 for details.

More Information

W32/Rbot-AGY is a worm and IRC backdoor Trojan for the Windows platform.

W32/Rbot-AGY runs continuously in the background, providing a backdoor server which allows a remote intruder to gain access and control over the computer via IRC channels.

When first run W32/Rbot-AGY copies itself to <System>\npfmntor.exe

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

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
GLF Network Lan Monitor
NPFMNTOR.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
GLF Network Lan Monitor
NPFMNTOR.exe

Registry entries are set as follows:

HKCU\Software\Microsoft\OLE
GLF Network Lan Monitor
NPFMNTOR.exe

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1

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