W32/Rbot-PX

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.

Check the following items

• To renable DCOM you can edit the registry, but it's better to use Dcomcnfg.exe. See Microsoft article 825750 for details.
• The HKLM\SYSTEM\CurrentControlSet\Control\Lsa\restrictanonymous = "1" setting does not allow enumeration of SAM accounts and names. The default is "0". It can be changed in Local Security Policy. See Microsoft article 246261 for details.
• Check your administrator passwords and review network security.

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

The worm copies itself to a file named crss.exe in the Windows system folder.

W32/Rbot-PX spreads using a variety of techniques including exploiting weak passwords on computers and SQL servers, exploiting operating system vulnerabilities (including DCOM-RPC, LSASS, WebDAV and UPNP) and using backdoors opened by other worms or Trojans.

W32/Rbot-PX can be controlled by a remote attacker over IRC channels. W32/Rbot-PX is a network worm and IRC backdoor Trojan for the Windows platform.

The worm copies itself to a file named crss.exe in the Windows system folder and creates the following registry entries:

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Sygate Personal Port = "crss.exe"

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\
Sygate Personal Port = "crss.exe"

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices\
Sygate Personal Port = "crss.exe"

W32/Rbot-PX may also set or modify the following registry entries:

HKLM\SOFTWARE\Microsoft\Ole\
EnableDCOM = "N"

HKLM\SYSTEM\CurrentControlSet\Control\Lsa\
restrictanonymous = "dword:00000001"

HKLM\SYSTEM\ControlSet\Control\Lsa\
restrictanonymous = "dword:00000001"

W32/Rbot-PX spreads using a variety of techniques including exploiting weak passwords on computers and SQL servers, exploiting operating system vulnerabilites (including DCOM-RPC, LSASS, WebDAV and UPNP) and using backdoors opened by other worms or Trojans.

W32/Rbot-PX can be controlled by a remote attacker over IRC channels. The backdoor component of W32/Rbot-PX can be instructed by a remote user to perform the following functions:

start an FTP server
start a Proxy server
start a web server
take part in distributed denial of service (DDoS) attacks
log keypresses
capture screen/webcam images
packet sniffing
port scanning
download/execute arbitrary files
start a remote shell (RLOGIN)

Patches for the operating system vulnerabilities exploited by W32/Rbot-PX can be obtained from Microsoft at:

http://www.microsoft.com/technet/security/bulletin/ms04-011.mspx
http://www.microsoft.com/technet/security/bulletin/ms03-039.mspx
http://www.microsoft.com/technet/security/bulletin/ms03-007.mspx
http://www.microsoft.com/technet/security/bulletin/ms01-059.mspx