Stration is an Internet worm that spreads by e-mail through messages with infected attachments. Once the user opens such an attachment, the parasite installs itself to the system. It may also open a text file containing random characters. Then Stration runs a spreading routine. It sends itself to e-mail addresses it gathers from local program, mail, web and text files. The worm may also attempt to download some files from the predetermined web site and execute them.