W32/Rbot-AND

Please follow the instructions for removing worms.

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

W32/Rbot-AND 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 vulnerabilities, including: LSASS (MS04-011), RPC-DCOM (MS04-012), WKS (MS03-049) (CAN-2003-0812), WebDav (MS03-007), UPNP (MS01-059) and Dameware (CAN-2003-1030)
- by copying itself to network shares protected by weak passwords

W32/Rbot-AND 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-AND includes functionality to:

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

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

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

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft Client
mshost.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft Client
mshost.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Client
mshost.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Client
mshost.exe

Registry entries are set as follows:

HKCU\SYSTEM\CurrentControlSet\Control\Lsa
Microsoft Client
mshost.exe

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
Microsoft Client
mshost.exe

HKCU\Software\Microsoft\OLE
Microsoft Client
mshost.exe

HKLM\SOFTWARE\Microsoft\Ole
Microsoft Client
mshost.exe

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

MS04-011
MS04-012
MS03-049
MS03-007
MS01-059