Threat Descriptions

Mill

Classification

Category :

Malware

Type :

Worm

Platform :

VBS

Aliases :

Mill

Summary

VBS/Mill is a VBScript virus.

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

Variant:Mill.F

When executed, the worm will first copy itself to following locations: 

C:\SeasonGreeting.txt.vbs

 C:\My Documents\SeasonGreeting.txt.vbs

 C:\Windows\SeasonGreeting.txt.vbs

 C:\Windows\System\SeasonGreeting.txt.vbs

 C:\Program Files\SeasonGreeting.txt.vbs

 C:\Windows\Samples\WSH\SeasonGreeting.txt.vbs

Then VBS/Mill.F creates a batch file "C:\Windows\System\SeasonGreeting\SeasonGreetingAutoExec.bat" which will delete all files with ".txt", ".exe" and ".zip" extensions files from "C:\My Documents" directory; and files with ".mp3" and ".mp2" files from "C:\My Music" and "C:\My Documents\My Music" directories.

Next the worm modifies the registry in such way that the worm will be executed on the next restart. It also changes Windows' registered owner to "EvilSanta", the product name to "SUX Windows 2004", as well as desktop picture and mouse and keyboard settings.

The worm searches for files with a different extension than ".vbs" from the root of the "C:" drive and from the "C:\My Documents" directory, and if found, creates an additional file with exensions ".txt" and ".vbs" with a big number of spaces between them. This file contains the worm itself

The worm speads itself via different ways, using mIRC and Outlook.

With mIRC it sends itself as "SeasonGreeting.txt.vbs" when an infected user joins an IRC channel.

Finally the worm sends itself using Outlook application. The message that it sends looks as follows: 

Subject:

You got a Christmas E-Card from you friend!"

 Body: Wishing you a Merriest Christmas!! ;)

 You got a Christmas Electronic Card from you friend!!

 Please open attachment to view E-Card

 E-Card Brought To You By,

 f0xCiTY
 Attachment: SeasonGreeting.txt.vbs