W32/Rbot-QK

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-QK is a network worm which attempts to spread via network shares. The worm contains backdoor functions that allow unauthorised remote access to the infected computer via IRC channels.

The worm spreads to network shares with weak passwords and by using either the LSASS security exploit (MS04-011) or the RPC-DCOM security exploit (MS04-012).

When run W32/Rbot-QK moves itself to the Windows System folder as a read-only, hidden, system file named taksmgr.exe. The worm then creates the following registry entries so as to run itself either on user logon or computer restart:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
Start Upping
taksmgr.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
Start Upping
taksmgr.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
Start Upping
taksmgr.exe

Once installed, W32/Rbot-QK will attempt to setup a SOCKS4 proxy server, download and run files from the internet, login to MS SQL servers and send EXEC commands to open a command shell on the server, partake in distributed denial-of-service attacks, log keystrokes and steal CD keys when instructed to do so by a remote attacker.