W32/Rbot-AXT

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.

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

W32/Rbot-AXT 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.

W32/Rbot-AXT exploits the following software vulnerabilities:
LSASS (MS04-011)
RPC-DCOM (MS04-012)
WKS (MS03-049) (CAN-2003-0812)
WebDav (MS03-007)
IIS5SSL (MS04-011) (CAN-2003-0719)
UPNP (MS01-059)
Veritas (CAN-2004-1172)
Dameware (CAN-2003-1030)
ASN.1 (MS04-007)

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

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

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoftf DDEs Control
msnn.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoftf DDEs Control
msnn.exe

Registry entries are set as follows:

HKLM\SOFTWARE\Microsoft\OLE
Microsoftf DDEs Control
MSNN.exe