types virus

types virus

1. To replicate itself, a network worm uses some sort of network vehicle. Examples include the following: Electronic mail facility:

   • A worm mails a copy of itself to other systems. Remote execution capability: A worm executes a copy of itself on another system
     • Adware.
       • Trojan Horse.
         • Polymorphic Virus.
           • Spyware
             • Direct Action Virus.
               • Resident Virus.
                 • Multipartite Virus.

2. Macro viruses – These are the largest of the three virus types. ...

   • Boot record infectors – Thevirse uses are known also as boot viruses or system viruses. ..
     • File infectors – These viruses target .

3. Boot Sector Virus. Topping our list is the boot sector virus. ..

   • Trojans. A Trojan (or Trojan Horse) disguises itself as legitimate software with the purpose of tricking you into executing malicious software on your computer.
     • The strictest definition of a "network virus" describes a relatively new type of malware that spreads from computer to computer without having to drop a file-based copy of itself in any of the affected computers. These viruses exist only as network packets, when they move from one computer to another, and in memory.

4. Definition(s): A computer program that can copy itself and infect a computer without permission or knowledge of the user. A virus might corrupt or delete data on a computer, use e-mail programs to spread itself to other computers, or even erase everything on a hard disk. See malicious code.

   • A computer virus is a program that spreads by first infecting files or the system areas of a computer or network router's hard drive and then making copies of itself. Some viruses are harmless, others may damage data files, and some may destroy files.