W32/Rbot-AIR

Please follow the instructions for removing worms.

Change any data that may have become compromised.

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 entry:

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

and remove any reference to any file you deleted.

Close the registry editor.

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

W32/Rbot-AIR spreads:

- to other network computers infected with:
Troj/Kuang,
Troj/Sub7,
Troj/NetDevil,
W32/MyDoom,
W32/Bagle and
Troj/Optix

- to other network computers by exploiting common buffer overflow vulnerabilites, including:
RPC-DCOM (MS04-012),
WebDav (MS03-007),
MSSQL (MS02-039) (CAN-2002-0649),
UPNP (MS01-059) and
Dameware (CAN-2003-1030)

- by copying itself to network shares protected by weak passwords

W32/Rbot-AIR 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-AIR includes functionality to:

- steal confidential information
- carry out DDoS flooder attacks
- silently download, install and run new software

When first run W32/Rbot-AIR moves itself to <System>\mixer.exe.

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

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft Update
mixer.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft Update
mixer.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Update
mixer.exe

The following patches for the operating system vulnerabilities exploited by W32/Rbot-AIR can be obtained from the Microsoft website:

MS04-012
MS03-007
MS02-039
MS01-059