What are the module objectives?

Introduction to viruses

Prerequisite for virus writing

Tools required for virus writing

As described in the previous article, viruses are self-replicating applications in the computer system that infect other related files and documents in the computer system.

Types of few viruses according to documents or files and modes of their attacks:

• Boot sector Viruses
• Program Viruses
• Multipartive viruses
• Stealth viruses
• Polymorphic Viruses
• Macro Viruses
• Active Viruses
• FAT
• COM Viruses

Prerequisite for Writing Viruses:

1. Knowledge of assembly language
2. Understanding of registers
3. Knowledge of C language
4. The concepts of Pointers
5. Functions and procedure calling

What are the required tools and utilities for writing a virus code:

• C compiler(Borland Turbo Assembler and or Borland C ++
• Norton Utilities
• Memory management utilities such as MAPMEM, PMAP, and MARK OR RELEASE

Components of Viruses:

• The concealer: It conceals the program from notice by the everyday user and even the virus scanner.
• The Replicator: This spread the viruses throughout the system of the clod who caught the virus
• Bomb/Payload: It is a part of the virus that does all the deletion/slow down, etc which makes the virus damaging too.

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