What are the most powerful computer viruses in the world?

In 2008 alone, computer viruses caused economic losses of up to US$8.5 billion worldwide. Computer viruses can be said to be the most serious hazards in the online world. Let me tell you what are the most powerful computer viruses in the world.

The world’s most powerful computer virus

1. CIH (1998)

This computer virus belongs to the W32 family and infects Windows 95/98 with EXE as the Suffix feasibility file

. It is extremely destructive and can overwrite the BIOS to make it useless (as long as the computer's microprocessor is

Pentium Intel 430TX). The consequence is that the user's computer cannot boot. The only solution< /p>

The method is to replace the original chip of the system. The computer virus broke out on April 26, and it will also destroy all the information in the computer hard drive. This computer virus does not affect MS/DOS, Windows 3.x and

Windows NT operating systems.

CIH can use all possible ways to spread: floppy disks, CD-ROMs, Internet, FTP downloads,

e-mail, etc. It is recognized as one of the most dangerous and destructive computer viruses of all time.

It broke out in Taiwan, China, in June 1998, causing losses of US$20 million to US$80 million worldwide.

2. Melissa (Melissa, 1999)

This virus specifically targets Microsoft’s email server and email sending and receiving software. It is hidden in a

A file in Word97 format, spread through email as an attachment, and is good at invading computers with Word97 or Word2000 installed.

It can attack the registrar of Word97 and modify its security settings to prevent macro viruses

so that the macro virus warning function of the files it infects is disabled.

In just a few hours after the Melissa virus was discovered, the virus infected millions of computers and tens of thousands of servers around the world through the Internet.

Thousands of computers and tens of thousands of servers, and the Internet was paralyzed in many places. . It broke out on March 26, 1999.

It infected 15%-20% of commercial PCs and caused losses of US$300 million to US$600 million worldwide.

3. I love you (love bug virus, 2000)

It broke out in Hong Kong, China on May 3, 2000. It was written in VBScript and could be spread through E-Mail.

Viruses, and the infected computer platforms are mainly Win95/98/2000. It has brought losses of 10 billion to 15 billion US dollars to the world.

4. Blaster (2003)

When the virus is running, it will constantly use IP scanning technology to find computers with Win2K or XP systems on the network

< p>, after finding it, use the DCOM RPC buffer vulnerability to attack the system. Once the attack is successful, the virus will be transferred to the other party's computer for infection, causing the system to operate abnormally, restart continuously, and even Causing

system crash. In addition, the virus will also perform a denial-of-service attack on a Microsoft upgrade website, causing the website to be blocked and preventing users from upgrading their systems through the website. It broke out in the summer of 2003, and hundreds of thousands of computers were infected, causing losses of US$2 billion to US$10 billion worldwide.

5. Panda Burning Incense

Panda Burning Incense is actually a variant of the worm virus, and it has evolved through many mutations, Nimya

Variant W (Worm.Nimaya.w), because the executable file of the poisoned computer will appear with the "Panda Burning Incense" pattern

, so it is also called the "Panda Burning Incense" virus. However, the original virus will only replace the EXE icon and will not damage the system itself. Most of them are virus variants. After the user's computer is infected, blue screens, frequent restarts, and data files in the system hard disk may be damaged. At the same time, some variants of the virus can spread through the LAN and then infect all computer systems in the LAN.

Eventually, the enterprise LAN will be paralyzed and cannot be used normally. It can infect exe, com, pif

, src, html, asp and other files in the system. It can also terminate a large number of anti-virus software processes and delete files with the extension gho , this file is a backup file of GHOST, a system backup tool, causing the user's system backup file to be lost. All .exe executable files in the infected user's system are changed into pandas

Holding three incense sticks.

Should we add a new one now? It is said that the attack is very scary?

6. Stuxnet virus (Stuxnet)

I recently read in the newspaper that, Many industrial companies in Iran have been attacked by a very special computer virus

. This computer worm, codenamed Stuxnet, invaded the control systems of factories and companies, and may have gained key control over a series of core production equipment, especially power generation companies. Bushel Nuclear Power Plant, which has attracted widespread attention in the West, is also a key target of the Stuxnet worm.

After conducting in-depth analysis of the Stuxnet virus, experts from some security manufacturers found that it may be the world's first "cyber weapon" put into actual combat.

The new virus adopts a variety of advanced technologies and has extremely strong stealth and destructive power. As long as the computer operator inserts the virus-infected USB flash drive into the USB interface, the virus will gain control of the industrial computer system without any operation.

Compared with traditional computer viruses, the Stuxnet virus does not make money by stealing personal privacy information. Since

it targets important targets around the world and does not require a network connection to spread,

it has been characterized by some experts as the world's first cyber weapon to be put into actual combat. ?. Once this kind of software enters the black market, the consequences will be disastrous. The U.S. Department of Homeland Security has also established a specialized agency to deal with the Stuxnet virus.

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