Email-Worm:W32/Runouce is distributed in infectious executable e-mail attachments.
When run it copies itself to the System Directory as Runouce.exe and modifies Windows Registry so that the copy in the direcorty is run each time Windows starts.
Searches for HTML files in the users' hard drive and modifies them to launch the file README.EML, created in the same directory where the HTML is found.
To propagate itself, Runouce creates e-mail messages with the following format:
Subject: [text, followed by "is comming!"]
From: [The sender address pretends to be one from yahoo.com]
The worm spreads itself as an attachment named pp.exe with MIME type audio/x-wav.
It uses a static server to send messages through its own SMTP engine.
Detection in F-Secure Anti-Virus was published on July 31st, 2002: