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