computer virus

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Functionalism

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computer virus

Web Scripting Virus

A web scripting virus breaches web browser security, allowing attackers to inject client-side scripting into the web page

Overwrite Virus

They simply delete the data (partially or completely) and replace the original code with their own.

Direct Action Virus

Direct Action Virus quickly gets into the main memory, infects all programs/files/folders defined in Autoexec.bat path, and then deletes itself.

Boot Sector Virus

These viruses inject their code into the hard disk’s partition table. It then gets into the main memory once the computer restarts.

Directory Virus

Directory Virus (also known as Cluster virus) infects the file by changing the DOS directory information.

Polymorphic Virus

Polymorphic viruses encode themselves using different encryption keys each time they infect a program or create a copy of themselves.

Memory Resident Virus

Memory resident virus lives in primary memory (RAM) and gets activated when you switch on the computer.

Macro Virus

These viruses are written in the same macro language used for popular software programs such as Microsoft Excel and Word.