The Five Characteristics of Viruses 20, The Five Characteristics of Viruses

1 Contagious.

2 Unauthorized Nature.

3 Concealment.

4 Latentity.

5 Destructive.

Hidden, destructive, unpredictable, parasitic, forgetful.

There is also contagion, epidemic.

1. Contagious.

He is an essential characteristic of the virus.

2. Concealment.

Viruses are generally short and concise programs with high programming skills. It is usually attached to a normal program or a more hidden place on the disk, and some of them appear as hidden files. The aim is to keep users from discovering its existence.

3. Latentity.

Most viruses do not attack immediately after infecting the system, they can hide in the system for a long time, and only activate their manifestation (destruction) module when their specific conditions are met. Only then can it be widely disseminated.

Fourth, destructive.

Any virus that invades a system will have varying degrees of impact on the system and applications.

5. Unpredictability.

In terms of virus detection, the virus is still unpredictable. Different kinds of viruses are very different, but some operations are common (e.g., reside in memory, change interrupt).

6. Parasitism.

It refers to the process by which a virus performs a series of illegal operations on other files or systems, making it carry the virus and become a new source of infection of the virus. This is the most basic characteristic of a virus.

7. Triggering.

It refers to the fact that the onset of the virus generally has a provocative condition, that is, a condition control. This condition can be the date, time, run of a particular program or the number of times the program has been run, etc., depending on the requirements of the virus compiler.

A biological virus is a non-cellular microorganism that is small, simple in structure, contains only a single nucleic acid (DNA RNA), and must parasitize in living cells and proliferate in a replication manner.

Firstly, it does not have a cellular structure, secondly, it is an organism because it can proliferate and produce offspring, and thirdly, it survives by living parasitism.

How do you know if you have the virus or not, this is the characteristics of the virus.

DoS Virus, Windows Virus, Intrusive Virus, Embedded Virus, Shell Virus, and Virus Maker.

Windows virus:

It mainly refers to viruses targeting the win9x operating system. Nowadays, computer users generally install Windows system, Windows viruses generally infect Win9X system, and the most typical virus is CIH virus. But that doesn't mean you can ignore the fact that the system is a WinNT series including Win2000 computers.

Some Windows viruses are not only infected normally on Win9X, but can also infect other files on WinNT. The main infected file extensions are exe, scr, dll, ocx, etc.

Intrusive virus:

You can replace some modules or stacks in your normal program with yourself. Therefore, this type of virus only attacks certain programs and is highly targeted. In general, it is difficult to detect and difficult to remove.

Embedded Virus:

This virus embeds itself in infected files, and when the files are infected, it is very difficult to detect and remove the virus. However, it is difficult to write embedded viruses, so there are not many such viruses.

Shell virus:

The virus attaches itself to the head or tail of the normal program. There are many types of viruses in this category, and most of the viruses that infect files are of this type.