Types of viruses in computers

Boot sector virus

Boot Sector Virus is one of the most dangerous types of viruses that infect a computer. This is because it infects the file responsible for loading the operating system, and it is difficult to get rid of this virus, especially if the boot sector is encrypted by the virus, and in most cases the device’s operating system must be deleted and reinstalled again.

File virus

A file virus is a type of virus that infects files. This type embeds itself with certain types of files that usually have the EXE extension. Or COM. This virus is not considered very dangerous because its effect is weak. It does not disable the operating system or delete files. Its effect is limited to making the infected files inaccessible, and it can be easily removed from the device.

Resident virus

The Resident Virus is classified as a type of virus that infects the computer's memory, where it hides itself there, and also infects any file that is run. It begins its activity when the operating system is loaded, and works whenever a specific program is run or loaded. This virus is considered one of the The worst viruses; Because it may affect the operating system, and it is difficult to remove it from the device due to its connection to memory.

Mutated viruses

Polymorphic virus is known as a virus that copies itself and constantly changes its code. It also encrypts its contents so that it is not detected by anti-virus programs, so it is considered one of the viruses that is difficult to remove. This virus also changes its code. It does not change the functions of its program or its basic characteristics, and as soon as it is detected by anti-virus programs, it changes its form and its code.

Rootkit virus

The targeted device is controlled by the Rootkit virus without the computer user knowing about it. The hacker accesses log files to spy on the computer user’s activities and change basic system settings. He installs basic programs to control the operating system, so that they have the ability to disable or modify the basic functions and programs in the device. This virus is difficult to detect. Via anti-virus software.

Macro viruses

Macro viruses attack commands written in the macro language, specifically Microsoft Office program commands. Such as Microsoft Word, where these viruses add malicious code to the original macro commands in the program, and modern versions of Office programs have been developed to disable these viruses by default.