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.


Technical Details

This brazilian virus contains three macros: autoOpen, CROWFuck, ArquivoSalvar. It replicates on opening and closing documents (autoOpen, ArquivoSalvar auto-macros).

The virus code contains many effects:

  1. the virus deletes macros accessing menu items,
  2. on the 5th of any month starting from April it inserts the strings into the document's summary info:
    Title    =    The CROW_Fuck!!!
    Subject  =    nothing
    Author   =    The Best Virus Creator
    Comments =   Surprise!!! You Die!!!!!
    VOCÊ FOI INFECTADO PELO VIRUS The CROW_Fuck - Macro - Fuck Microsoft,,
    Mcafee, ThunderByte and more!!!
    !í!í! Bye Bye LAMMER !í!í!
  3. on 8th of any month starting from May it adds a file erasing commands to the C:AUTOEXEC.BAT file and then displays the MessageBox:
    The CROW_Fuck - Macro virus
    Surprise!!! You Die!!!!!!
    > >  Brazil  < <
  4. if system minutes > 57 , the virus prints to the status bar the running string:
    The CROW_Fuck - Brazil - 97 !!!!!
  5. if there are more than 50 words in document, the virus insert a space at random selected place. Depending on random counter it also insert into document the "CROW" word.
  6. on Fridays the virus insert the text into document:
    CROW_Fuck - The Complete Macro Vírus
    Este vírus é dedicado a todos que pensam que o povo do terceiro mundo não
    é capaz de criar coisas que tenham utilidade; aos Lammers, porque sem
    eles não daria para se disseminar o vírus; à Microsoft, por tornar tão
    fácil a pirataria; à Mcafee, por seu Vir
    usScan ser totalmente burro e fácil de se enganar.
    See Ya
    The CROW

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