W32/Rbot-ZP

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-ZP is an IRC backdoor Trojan and network worm.

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

W32/Rbot-ZP 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-ZP can receive commands from a remote intruder such as, delete network shares,log keypresses, participate in DDoS attacks, scan other computers for vulnerabilities and create administrator accounts.

W32/Rbot-ZP copies itself to the Windows system folder as MSMSN32.EXE and creates the following registry entries in order to run automatically on computer login:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft Messenger XP
MSMSN32.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
Microsoft Messenger XP
MSMSN32.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft Messenger XP
MSMSN32.exe