W32/Rbot-ALV

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 entries:

HKU\[code number]\Software\Microsoft\Windows\
CurrentVersion\Run\

HKU\[code number]\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.

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

W32/Rbot-ALV 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-ALV copies itself to the Windows system folder with a randomly generated filename.

The following registry entries are created to run the dropped file on startup:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Windows Security Service
<filename>

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Windows Security Service
<filename>

HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices
Windows Security Service
<filename>

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Windows Security Service
<filename>

Registry entries are set as follows:

HKCU\SYSTEM\CurrentControlSet\Control\Lsa
Windows Security Service
<filename>

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
Windows Security Service
<filename>

HKCU\Software\Microsoft\OLE
Windows Security Service
<filename>

HKLM\SOFTWARE\Microsoft\Ole
Windows Security Service
<filename>

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1