W32/Rbot-SS

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

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

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Microsoft LAN32 Protocol
"lanXp.exe"

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Microsoft LAN32 Protocol
"lanXp.exe"

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunServices
Microsoft LAN32 Protocol
"lanXp.exe"

W32/Rbot-SS 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.

The worm attempts to terminate the following processes:
bbeagle.exe
d3dupdate.exe
i11r54n4.exe
irun4.exe
MSBLAST.exe
msblast.exe
msconfig.exe
mscvb32.exe
navapw32.exe
navw32.exe
netstat.exe
PandaAVEngine.exe
Penis32.exe
rate.exe
regedit.exe
ssate.exe
sysinfo.exe
SysMonXP.exe
taskmon.exe
teekids.exe
wincfg32.exe
winsys.exe
winupd.exe
zapro.exe
zonealarm.exe

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

Sophos's anti-virus products include proactive protection technology, which can defend against new threats without requiring an update. Sophos customers have been protected against W32/Rbot-SS (detected as W32/Rbot-Fam) since version 3.85.