Zoher

Zoher is an Internet worm. It spreads by e-mail in infected messages. It automatically infects a PC when a user opens such message for preview. There is no need to run any attachments. However, the worm doesn't install itself to the computer and activate its spreading routine again only when a user opens a message. The worm sends its copies to some e-mail addresses found in a computer. It also connects to the Internet and can be updated or modified by the author.