Kaspersky Threats

Parent class: VirWare

Viruses and worms are malicious programs that self-replicate on computers or via computer networks without the user being aware; each subsequent copy of such malicious programs is also able to self-replicate. Malicious programs which spread via networks or infect remote machines when commanded to do so by the “owner” (e.g. Backdoors) or programs that create multiple copies that are unable to self-replicate are not part of the Viruses and Worms subclass. The main characteristic used to determine whether or not a program is classified as a separate behaviour within the Viruses and Worms subclass is how the program propagates (i.e. how the malicious program spreads copies of itself via local or network resources.) Most known worms are spread as files sent as email attachments, via a link to a web or FTP resource, via a link sent in an ICQ or IRC message, via P2P file sharing networks etc. Some worms spread as network packets; these directly penetrate the computer memory, and the worm code is then activated. Worms use the following techniques to penetrate remote computers and launch copies of themselves: social engineering (for example, an email message suggesting the user opens an attached file), exploiting network configuration errors (such as copying to a fully accessible disk), and exploiting loopholes in operating system and application security. Viruses can be divided in accordance with the method used to infect a computer:

file viruses
boot sector viruses
macro viruses
script viruses

Any program within this subclass can have additional Trojan functions. It should also be noted that many worms use more than one method in order to spread copies via networks.

Class: Virus

Viruses replicate on the resources of the local machine. Unlike worms, viruses do not use network services to propagate or penetrate other computers. A copy of a virus will reach remote computers only if the infected object is, for some reason unrelated to the virus function, activated on another computer. For example: when infecting accessible disks, a virus penetrates a file located on a network resource a virus copies itself to a removable storage device or infects a file on a removable device a user sends an email with an infected attachment.

Read more

Platform: MSWord

Microsoft Word (MS Word) is a popular word processor and part of Microsoft Office. Microsoft Word files have a .doc or .docx extension.

Description

Technical Details

This is a stealth macro virus. It contains 3 modules and 11 functions: AutoOpen, Gamble1, ToolsMacro, CommandButton2_Click, CommandButton5_Click, Image1_Click, Label2_Click, Label3_Click, Label4_Click, UserForm_Click, CommandButton1_Click.

On opening an infected file the virus disables the VirusProtection and infects the global macros area (NORMAL.DOT), then on opening not infected files the virus infects them.

The virus substitutes the Tools/Macro menu (stealth), on pressing the "Create" button it displays the MessageBox:

Memory Allocation Error
Not Enough Memory To Complete The Request

On Mondays the virus displays the DialogBox:

Word Macro97 Virus "The Gambler" By Talon 1997
You System Is Infected By "The Gamble" Word Macro Virus
I Will Give You One Chance To Save Your Files, If You Can Guess The
correct Number between 1 And 10, I Will Return Your System To Your Control
If Your Wrong, Well We Won`t Go There. Do Not Not Turn Your System
Off. Your system FIles Have Been Encrypted With A Random Number, If This
Is Not Completed Your System Will Not Be Able To Reboot. Just Play Along
And Hope Your A Good Guess.
When Your ready To Play Press Here

On pressing the mouse button on Dialog the virus displays the MessageBox:

Trying To Cheat??
Are You Trying To Cheat?? One More Attempt like That And it's Over

On pressing "HERE" button the virus ask for a number from 1 till 10. On entering '5' the virus display the MessageBox:

Your A Winner
Good Guess, It's All Yours

In any other case the virus sets the password to current documents and exits Windows.

Find out the statistics of the vulnerabilities spreading in your region on statistics.securelist.com

Found an inaccuracy in the description of this vulnerability? Let us know!