W32/Rbot-BBT

Please follow the instructions for removing worms.

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

W32/Rbot-BBT spreads via network shares, via MSSQL when it finds weak passwords, and by exploiting common vulnerabilities, including LSASS (MS04-011) and ASN.1 (MS04-007).

W32/Rbot-BBT 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-BBT attempts to disable various security related applications, including terminating any Anti-Virus processes it recognises.

When first run W32/Rbot-BBT copies itself to <System>\devcode32.exe.

The following registry entries are created to run devcode32.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft Windows Workstation
devcode32.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Windows Workstation
devcode32.exe

W32/Rbot-BBT sets the following registry entries, disabling the automatic startup of other software:

HKLM\SYSTEM\CurrentControlSet\Services\wuauserv
Start
4

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess
Start
4

Note: disabling autostart for the SharedAccess service deactivates the Microsoft Internet Connection Firewall (ICF).

Registry entries are set as follows:

HKCU\Software\Microsoft\OLE
Microsoft Windows Workstation
devcode32.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings
MaxConnectionsPer1_0Server
50

HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings
MaxConnectionsPerServer
50

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
restrictanonymous
1