W32/Rbot-RJ

Please follow the instructions for removing worms.

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-RJ is a worm which attempts to spread to remote network shares. The worm also contains backdoor Trojan functionality, allowing unauthorised remote access to the infected computer via IRC channels.

W32/Rbot-RJ may prevent access to some anti-virus websites and may
terminate some anti-virus and security software. W32/Rbot-RJ is a worm which attempts to spread to remote network shares. The worm also contains backdoor Trojan functionality, allowing unauthorised remote access to the infected computer via IRC channels while running in the background as a service process.

W32/Rbot-RJ may spread to network shares with weak passwords and via network security exploits.

W32/Rbot-RJ worm copies itself to the Windows system folder as a random four letter name with an EXE extension. The worm then sets the following registry entries to ensure it is run on startup:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Daemons Updates Services

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Daemons Updates Services

HKCU\Software\Microsoft\Windows\CurrentVersion\Run\
Daemons Updates Services

HKCU\Software\Microsoft\Windows\CurrentVersion\RunServices\
Daemons Updates Services

Each entry is set to the generated random name.

W32/Rbot-RJ may set the following registry entries, again often resetting them at regular intervals:

HKLM\SOFTWARE\Microsoft\Ole\
EnableDCOM
N

HKLM\SYSTEM\CurrentControlSet\Control\Lsa\
restrictanonymous
1

W32/Rbot-RJ may periodically set all the above values to these new values.

W32/Rbot-RJ may also attempt to terminate certain processes relating to anti-virus, security and system programs, such as:

SWEEP95.EXE
BLACKICE.EXE
DRWATSON.EXE
REGEDIT.EXE
SCAN95.EXE
F-PROT95.EXE
AVP.EXE

W32/Rbot-RJ may also update the file

<system>\drivers\etc\host

appending entries such as

127.0.0.1 www.sophos.com

in order to prevent the machine contacting various anti-virus websites, including:

www.sophos.com
www.symantec.com
www.mcafee.com
www.kaspersky.com
www.avp.com