What are the common computer viruses?

Computer virus (Computer Virus) is a set of computer instructions or program codes that the programmer inserts into a computer program to destroy computer functions or data, can affect the use of the computer, and can replicate itself. The top ten common viruses are:

1. System viruses. The prefixes of system viruses are: Win32, PE, Win95, W32, W95, etc. The general public characteristic of these viruses is that they can infect

*.exe and *.dll files of the Windows operating system and spread through these files. Such as CIH virus.

2. Worm virus. The prefix of worm virus is: Worm. The common characteristic of this virus is that it spreads through network or system vulnerabilities. Most worms have the characteristic of sending out poisonous emails and blocking the network. For example, shock wave (blocking the network), little postman (sending poisonous emails)

etc.

3. Trojan viruses and hacker viruses. The prefix of Trojan virus is: Trojan, and the prefix of hacker virus is generally Hack

. The public characteristic of Trojan viruses is to enter the user's system through network or system vulnerabilities, hide them, and then leak the user's information to the outside world, while hacker viruses have a visual interface that can remotely control the user's computer. Trojan horses and hacker viruses often appear in pairs, that is, the Trojan horse virus is responsible for invading the user's computer, and the hacker virus will be controlled through the Trojan horse virus. Both types are now increasingly integrated. Common Trojans such as QQ message tail Trojan

Trojan.QQ3344, and you may encounter more Trojan viruses targeting online games such as Trojan.LMir.PSW.60

. One more thing to add here is that if there is PSW or PWD in the virus name, it generally means that the virus has the function of stealing passwords (these letters are generally the abbreviation of "password" in English). Some hacker programs such as: Network Kingpin (Hack.Nether.Client) etc.

4. Script virus. The prefix of script viruses is: Script. The public characteristics of script viruses are viruses written in script languages ??and spread through web pages, such as Code Red (Script.Redlof) - not our boss code brother. Script viruses will also have the following prefixes: VBS, JS (indicating what kind of script is written), such as VBS.Happytime, Js.Fortnight.c.s, etc.

5. Macro virus. In fact, macro viruses are also a type of script viruses. Due to their particularity, they are counted as a separate category here. The prefix of the macro virus is: Macro, and the second prefix is: one of Word, Word97, Excel, Excel97 (perhaps others). All viruses that only infect WORD documents of WORD97 and earlier versions use Word97 as the second prefix, and the format is: Macro.Word97; all viruses that only infect WORD documents of WORD97 and later versions use Word as the second prefix, and the format is: Macro.Word ; Any virus that only infects EXCEL documents of EXCEL97 and earlier versions uses Excel97 as the second prefix, and the format is: Macro. Excel, and so on. The public characteristic of this type of virus is that it can infect OFFICE series documents and then spread through OFFICE general templates, such as the famous Macro.Melissa.

6. Backdoor viruses. The prefix of the backdoor virus is: Backdoor. The public characteristic of this type of virus is that it spreads through the network, opens a backdoor to the system, and brings security risks to users' computers. For example, 54 many friends have encountered the IRC backdoor Backdoor.IRCBot

7. Virus planting program virus. The common characteristic of this type of virus is that one or several new viruses will be released from the body into the system directory when running, and the released new viruses will cause damage.

Such as: Glacier Sower (Dropper.BingHe2.2C), MSN Shooter (Dropper.Worm.Smibag), etc.

8. Destructive program viruses. The prefix for destructive program viruses is: Harm. The common characteristic of this type of virus is that it has beautiful icons to entice users to click. When the user clicks on this type of virus, the virus will directly cause damage to the user's computer. For example: format C drive (Harm.formatC.f), killer command (Harm.Command.Killer), etc.

9. Joke virus. The prefix of the joke virus is: Joke. Also called hoax virus. The public characteristic of this type of virus is that it has beautiful icons to entice users to click. When users click on this type of virus, the virus will perform various destructive operations to scare the user. In fact, the virus does not cause any damage to the user's computer. Such as: Joke.Girlghost virus.

10. Bundled machine viruses. The prefix of the bundler virus is: Binder. The public characteristic of this type of virus is that virus authors will use specific bundling programs to bundle the virus with some applications such as QQ and IE. On the surface, it is a normal file. When users run these bundled viruses, they will run on the surface. The application then hides and runs bundled viruses, causing harm to users. For example: Bundle QQ (Binder.QQPass.QQBin), System Killer (Binder.killsys), etc.