W32/Randon-AN

Please follow the instructions for removing worms.

Windows NT/2000/XP/2003

In Windows NT/2000/XP/2003 you will also need to edit the following registry entry. The removal of this entry is optional in Windows 95/98/Me. 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 entry:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
ansjava
<path to mIRC application>

and delete it if it exists.

Close the registry editor.

W32/Randon-AN is a network worm with IRC backdoor functionality.

W32/Randon-AN can spread through IRC channels and network shares. W32/Randon-AN is a network worm with IRC backdoor functionality.

W32/Randon-AN can spread through IRC channels and network shares.

The worm is distributed as a self-extracting archive which installs the worm's components. The following files are created:

app.exe - a clean utility to manage processes
netservup.exe - a hacked mIRC application, detected as W32/Randon-AN
nsrust.exe - a legitimate tool to hide windows
nsup1.sys - an empty file
nsup2.sys - a harmless configuration file
nsup3.sys - a configuration file, detected as W32/Randon-AN
nsuser.bat - a BAT file to add a user to the local computer
tool.sys - a configuration file, detected as W32/Randon-AN

The worm creates the following registry entry in order to run itself automatically on computer logon:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
ansjava
<path to mIRC application>