Viruses usually attack computers without adequate protection. But, in the spread of dangerous viruses, even the use of antivirus can not overcome them.
Viruses on computers are quite dangerous because they can damage laptops, or even spread the user's personal data.
Usually, viruses attack computers that do not have protection. The easiest way to prevent this is by using an antivirus.
But, in some cases, antivirus alone can't handle it. In fact, even dangerous viruses can cause huge losses in business.
Dangerous Viruses that Appallate the World
Losses caused by computer viruses are not only limited to damaging the device, but can also spread company or even state secrets.
This case is then horrendous for the world because the losses caused are enormous and threaten the country whose data was hacked.
1. Melissa
In the spring of 1999, David L. Smith created a computer virus in Microsoft Word . He also named this virus with the name of the exotic Florida dancer, Melissa.
This virus spreads through messages in e-mail. Once activated, the Melissa virus will replicate and automatically send to the top 50 contacts in the email address book on the server.
As a result, the Melissa virus also successfully shocked the American government and a number of private companies there.
2. ILOVEYOU
After the Melissa virus which had shocked the world, a dangerous computer virus emerged from the Philippines in 2000. Interestingly, this virus was named ILOVEYOU.
The form is a worm, which is a program that can replicate itself. The spread was similar to Melisa, namely via email.
The original file of this virus is LOVE-LETTER-FOR-YOU.TXT. vbs. VBS is an abbreviation of Visual Basic Scripting.
This well-known virus damages 10 percent of computer systems in the world , causing losses of up to USD10 billion (Rp163 trillion).
3. Code Red
Code Red, which appeared in the summer of 2001, attacked Windows 2000 & NT. The effect of this virus will make a full buffer to use up memory.
This worm type of virus was discovered by eEye Digital Security targeting Microsoft IIS Web Server. This virus also hacked 1-2 million from 6 million servers .
In addition to damaging web pages, this virus also left a message that read " Hacked by Chinese! ".
As a result, Code Red virus caused a loss of around USD2 billion (Rp32 trillion). In fact, this virus had infiltrated the whitehouse.gov website, gang.
4. SQL Slammer / Saphire
This dangerous computer virus is called SQL Slammer / Saphire and can spread quickly through the internet.
The virus that emerged in 2003 even had time to make ATM services in America crash. This visit also disrupted 911 Seattle and Continental Airlines services .
This virus also caused several flights to be canceled due to error check-ins and ticketing. The losses incurred were more than USD 1 billion (IDR 16 trillion).
5. Storm Worm
This virus spread in late 2006 when a programmer found it. Virus in the form of a Trojan horse program is lit another program at the same time.
The name Storm Worm was taken because one of the emails that spread it had the subject "230 dead as storm batters Europe".
But, some antivirus companies call it by another name, for example McAfee calls it as Nuwar.
6. Conficker
This worm type virus was discovered in October 2008 and is categorized as dangerous because it can spread very quickly.
Conficker spreads through the Microsoft Windows operating system and can infect more than 9 million computers worldwide, gangs
Conficker became a virus that caused enormous damage to cause a loss of around USD9 billion (Rp147 trillion).
7. WannaCry Ransomware
The virus, also known as WannaCrypt, is a type of malicious software or malware that attacks computers.
This very troubling ransomware locks the computer or encrypts all the files so that it cannot be accessed again by the owner.
In 2017, WannaCry Ransomware successfully infected internet computer networks in around 100 countries, including Indonesia .
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