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