Email-Worm:​W32/Runouce

Summary

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A worm that spreads via e-mail, usually in infected executable e-mail file attachments.

Removal

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Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

Detailed instructions for F-Secure security products are available in the documentation found in the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for further assistance.

Technical Details

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Email-Worm:W32/Runouce is distributed in infectious executable e-mail attachments.

Installation

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.

Propagation

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.

Variant:Runouce.B

Runouce is an internet worm. When run it copies itself to the System Directory as Runouce.exe and modifies windows registry so it 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. Sends e-mail with the following format:

Subject: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

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Detection in F-Secure Anti-Virus was published on July 31st, 2002:

Detection Type: PC
Database: 2002-07-31_01