Email-Worm:W32/Mimail.D

Classification

Malware

Email-Worm

W32

Email-Worm:W32/Mimail.D

Summary

This type of worm is embedded in an email attachment, and spreads using the infected computer's emailing networks.

Removal

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

Find out more

Knowledge Base

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User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

Email-Worm:W32/Mimail.D is a worm that propagates in infected email attachments.

The worm file is a PE executable 24608 bytes long. It is not compressed.

The worm can also exploit a vulnerability to drop and execute a file. Apart from this, Mimail.D does not have a payload.

Mimail.D was found on 1 November, 2003.

Installation

The worm's file installs itself as VIDEODRV.EXE file into Windows directory and creates a startup key for its file in the Registry:

  • [HKLM\Software\Microsoft\Windows\CurrentVersion\Run] "VideoDriver" = "%windir%\videodrv.exe"

where %windir% is a Windows directory name.

Propagation

The worm spreads itself in the following message:

Subject: your account Body:
 Hello there,
I would like to inform you about important information regarding your
 email address. This email address will be expiring.
Please read attachment for details.
Best regards, Administrator

 Attachment: message.zip
 

The attachment contains message.html which, when opened in vulnerable versions of Internet Explorer (IE), will drop an executable named epo.exe and run it.

For more information on the IE MHTML vulnerability used here please see http://www.microsoft.com/technet/security/bulletin/MS03-014.asp