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Since 1987- when a virus infected ARPANET, a vast network used by the Department of Defense and many universities, many antivirus programs were developed, which periodically checks the computer system in search of viruses. In 1971, Bob Thomas of BNN technologies wrote a program, 'Creeper System' - a self-replicating program to test Jon von Neumann's theory, which was published as an article in 1949. Even documents (like Word, Excel, Notepad) do carry Viruses when these files get affected.
#HOW TO CREATE A VIRUS USING NOTEPAD HARMFUL PDF CODE#
Virus code gets replicate when copied by users.Viruses travel through flash drives, CD drives, pen drives, the Internet, etc.A virus that replicates itself to other computers without being attached to any files is called 'Worms'. Even a simple virus can be dangerous as it will quickly capture the memory and bring the system to a halt. Other deadly viruses stay dormant during their whole life cycle and keep sending the victim's information to its owner/creator. Other types of viruses stay dormant until they get a suitable digital environment for execution. Some viruses wreak their effects as their codes get executed. Binding the Virus behind other daily usable files makes normal users unaware that they are unknowingly triggering the Virus and infecting themselves. As a hacker, you should know what binding is. The technique of making a disguise of these viruses and hiding them behind other files is called 'Binding'. Viruses can be disguised as images, audio, software, videos, or other attachments. These viruses often get spread via email attachments or Instant Messaging (IM). Hackers use these virus codes to corrupt or delete data from the victim's computer or use email to spread to other computers or networks. # Countermeasures Against Computer Virus What is Computer Virus?Ī computer virus is a program or a piece of code that is specifically designed to spread from computer systems to another computer and interfere with computer operation without the victim's knowledge.