Virus.MSWord.Dub

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.

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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 very dangerous encrypted macro virus. It contains 12 macros that are copied to 13 macros while infecting documents and the global macros area:

Documents       NORMAL.DOT
1  AutoExec        AutoExec          Infects global macros area
2  Annihilator     FileSaveAs        Infects documents
Annihilator
3  FCDub           FCDub             Infects global macros area
FileClose
4  Message         Message
5  NewDocInsert    NewDocInsert
6  SearchDestroyer SearchDestroyer
SDDuplicate
7  ExeKiller       ExeKiller
8  AEDub           AEDub
9  AutoExit
10  FileTemplates   FileTemplates
11  ToolsMacro      ToolsMacro
12  KillIt          KillIt

The virus also searches for *.DOC files on the C: drive, replaces their contents with the text "666" and infects them, if they are of Word format. While searching and infecting DOC files the virus creates a log file and writes the following text to there:

********************************************************
WinWord.Satan-Bug Macro Virus
Created by WinWord Virus Generator (Baku, Azerbaijan)
DATA DESTRUCTION PROTOCOL
********************************************************
Log file generated
Killed:
Total number of infected files(provided no macro interruption took place):
Comments: There are some real smart people in Azerbaijan that know what's
happening... They are capable of generating powerful macro viruses...
This virus is one of them but more sophisticated ones are coming up...
WinWord.Satan-Bug will be back...
Virus ID number: 666
End of Protocol
********************************************************

The virus also corrupts disk files, displays MessageBoxes:

This file has caused a fatal error (exception 06) at address 0000:00053B4.
Data loss might be inevitable.  Press OK to fix this problem...
ATTENTION!!! Do not interrupt while Microsoft Word is fixing this problem!
This may result in severe file damage...
WinWord.Satan-Bug
For more details on this operation check out the  'C : DDP' directory on
your hard disk...
Wait, please ... Microsoft Word has found 13 missing strings at address
0000:4BC1 which belong to a file in use.  To avoid data loss, Word has to
search your disk for all .doc files and attach the missing string to a
corresponding file. Press OK to continue ...

The virus overwrites the C:AUTOEXEC.BAT file with text:

@echo off
cls"
Echo Hey, sucker!!!
Echo Your computer is infected with WinWord.Satan-Bug virus...
pause

It also renames the main menu:

File   -> WW.Satan-Bug
Edit   -> Concept
View   -> Nuclear
Insert -> DMV
Format -> NPad
Tools  -> Wazzu
Table  -> Satanic
Window -> Tedious
Help   -> Other...

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