W32/Forbot-ER

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\RunOnce\
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 entries:

HKU\[code number]\Software\Microsoft\Windows\
CurrentVersion\Run\

HKU\[code number]\Software\Microsoft\Windows\
CurrentVersion\RunOnce\

and remove any reference to any file you deleted.

Close the registry editor.

W32/Forbot-ER 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.

W32/Forbot-ER spreads to unpatched computers affected by the LSASS security exploit (MS04-011). W32/Forbot-ER 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.

W32/Forbot-ER spreads to unpatched computers affected by the LSASS security exploit (MS04-011).

When run the worm moves itself to the Windows System folder as instantmsgrs.exe and creates the following registry entries so as to run itself on computer logon:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run
mousedrive.exe
instantmsgrs.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunOnce
mousedrive.exe
instantmsgrs.exe

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices
mousedrive.exe
instantmsgrs.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\Run
mousedrive.exe
instantmsgrs.exe

HKCU\Software\Microsoft\Windows\CurrentVersion\RunOnce
mousedrive.exe
instantmsgrs.exe

Once installed, W32/Forbot-ER will attempt to setup an HTTP and a SOCKS4 proxy server, delete connections to network shares, participate in denial-of-service (DoS) attacks, harvest email addresses and steal CD keys when instructed to do so by a remote attacker.