Computer Viruses | Different Types Of Virus Attack | TECH WORTHY MIND

A virus refer to piece of Software that is designed and developed with the purpose of infecting a computer system and perform illicit operations.A virus infected system can hamper data stored on a hard drive, crash the OS , or get spread on a network. Some of the ways by which a virus get transmitted to a system are:

Viruses

• On using infected media, such as CDs or USB drives

• Through E-mail and accessing social website

• As a part of another program 

Different types of virus can be classified as follows:

∆ Polymorphic: Refers to the virus types that change from one form to another to avoid being detected . A system infected by a Polymorphic virus display a message and deletes the files available on the system . This virus involves the process of mutation which consists of encrypting its part to avoid detection.

Virus attack:

Showing Polymorphic Virus Attack

∆Stealth: Refer to a virus type that masks  itself from application in order to avoid being detected . The stealth virus gets attached to the boot sector of hard disk . The infected file is of different size than the original.

Showing Stealth Virus Attack

∆ Retroviruses: Refer to the virus types that bypass installed antivirus software. The Retroviruses is capable of making direct attack on an antivirus.

∆ Multipartite: Refer to a virus type that has the ability to react in multiple ways. The Multipartite virus provide harm to a system in such a way that it infects boot sector and executable files.

Showing Multipartite Virus Attack

∆ Armored: Refers to a virus type that is difficult to detect . This virus type disable the virus debuggers or disassemblers from examining critical virus elements, as it is written in such a way that actual code designed to harm the computer is not directly visible.

∆ Companion: Refers to a virus type that gets spread by attaching itself with other programs. The computer virus when attached with legitimate programs gets saved with a different file extension and is saved in a temporary directory of a computer.

∆ Phage: Refers to a virus 🦠 type that is responsible for modification in other applications and programs. The phage virus harms the system in such a way that the only option to recover is to reinstall the infected programs.

∆ Macro viruses: Refer to the virus types that effect the enhancement available in application programs. For example, macros feature of MS Word enable automatic spell ✅ check of a document when it is opened.

After getting acquainted with the different virus types, let's get familiar with symptoms of virus infection. Some off symptoms are as follows:

• Launch process of an application or a program gets slow

• Files either appears or disappears 

• Size of the installed program gets change automatically

• Interface of application or program might get change 

• System gets shutdown or restart in an automatic manner

• Access to drives is restricted

Showing Virus Transmission over a Network

The basic function of a virus is either to stope functioning of OS or spreading to other systems. When a system is infected by virus, each available file in a system attached itself with a virus.

As already discussed, a virus can be even transmitted through network.