W32/Rbot-ZB

Please follow the instructions for removing worms.

W32/Rbot-ZB is an IRC backdoor Trojan and network worm.

W32/Rbot-ZB may spread to remote network shares protected by weak passwords and computers vulnerable to common exploits. The worm also opens up a backdoor, allowing unauthorised remote access to infected computers via the IRC network, while running in the background as a service process. The worm exploits the following vulnerabilities: RPC-DCOM (MS04-12) and LSASS (MS04-11). For patches for these vulnerabilities, see:

http://www.microsoft.com/technet/security/bulletin/MS04-011.mspx
http://www.microsoft.com/technet/security/bulletin/MS04-012.mspx

W32/Rbot-ZB can receive commands from a remote intruder to delete network shares, log keypresses, participate in DDoS attacks, scan other computers for vulnerabilities, steal passwords, steal registration keys for computer games, create administrator accounts, terminate firewall and anti-virus processes and capture video from webcameras attached to the computer.

W32/Rbot-ZB copies itself to the Windows system folder as "rant.exe" and creates the following registry entries in order to run automatically on computer login:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
rant
rant.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
rant
rant.exe

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
rant
rant.exe

The worm also hardens the computer against further attack by setting the following registry entries:

HKLM\SOFTWARE\Microsoft\Ole
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa
resrictanonymous
1