W32/Rbot-YS

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-YS is a network worm and IRC backdoor Trojan for the Windows platform.

W32/Rbot-YS 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-YS can be controlled by a remote attacker over IRC channels. The backdoor component of W32/Rbot-YS 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)

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

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
CT Control Settings
"CTSVCCD.EXE"

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
CT Control Settings
"CTSVCCD.EXE"

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
CT Control Settings
"CTSVCCD.EXE"

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

MS04-011
MS03-039
MS03-007
MS01-059