• Tag Archives computer virus
  • Top Computer Viruses

    Computer viruses affect people all over the world. But which ones are the worst of all time? The following is a list of some of the most well known viruses and malware to be made public. Most virus protection software (e.g. Norton Antivirus, McAffee, or PC Tools Antivirus) on the market will protect you from these.

    Melissa
    Combine the illicit thrill of an exotic dancer with the manipulative genius of a hacker and you have one of the worst computer viruses of all time. Melissa was created by David L. Smith, named for his favorite Friday Night Gal, and released into the world on March 26th, 1999. Posing as an email attachment, the self-replicating virus activated when the malicious attachment was opened, then sent itself to the top 50 people in the email client contact list. The damage was so great that some companies had to shut down email programs until the virus was contained. Smith was convicted, fined $5,000 and spent 20 months in jail. Before Melissa, public knowledge of the detriment of malware was previously unknown.

    ILOVEYOU/Love Letter
    Ironically named, this love letter was sent from the Philippines in May of 2000 and wreaked havoc on computers around the world. Beginning as an email that claimed the attachment contained honey-filled words from a secret admirer, the subsequent worm that was unleashed worked in multiple ways. After copying itself into several different files and adding new registry keys to the victims computer, ILOVEYOU would then download a password stealing application that would email personal data to the hackers account. ILOVEYOU then used email and chat clients to send itself to other sources, further perpetuating the cycle. Some sources claim the ILOVEYOU computer virus caused over $10 billion in damages.

    Code Red
    Taking advantage of a vulnerability in Windows 2000 and Windows NT operating systems, the Code Red and Code Red II computer worms began to gain traction shortly after their 2001 release. Creating a large botnet by installing backdoors on infected machines, Code Red initiated a DDos (distributed denial-of-service) attack on the White House by commanding all computers within its extensive network to contact its web servers at one time. This act overloaded the servers, rendering them unable to perform their needed actions.

    SQL Slammer/Sapphire
    The SQL Slammer, also known as Sapphire, was a computer virus that infected the most heavily used web servers across the US at an alarming rate. In January of 2003, the SQL Slammer caused a number of issues including outages in 911 service in Seattle, crashed the Bank of Americas ATM service, and left Continental Airlines with so many electronic issues that they were forced to cancel flights. Over the course of the computer virus extensive life, it caused over $1 billion in damages before antivirus and antispyware software was able to patch the problem.

    Sasser/Netsky
    A relatively new exploit, Sasser, began to infect computers around the world on April 30th, 2004 by taking advantage of non-updated Windows 2000 and Windows XP operating systems. Once a PC was infected with Sasser, the malware would scan the PC for other unprotected computers in its network and replicate onto them. Aside from causing massive damage to the computer, Sasser also made shutting down any computer difficult without cutting off the power source. The same group of black hat hackers that created Sasser also took credit for Netsky, a virus that propagated through an email attachment, causing massive DDoS attacks. At their height, the two viruses were said to have cost tens of millions of dollars in damage, including forcing flight cancellations and delays for Delta Airlines and shutting down satellite communications a few French news agencies.

    MyDoom
    MyDoom makes the list for its ability to bring prominent search engines to their knees. In February of 2004, the creators of MyDoom released the first phrase of this virus into the world. The worm installed backdoors on computers and initiated a DoS attack. The worm was commanded to stop distributing just short of two weeks after it began. Later that year, MyDoom was released again with greater voracity. Like other viruses of its lot, MyDoom searched email contacts as a method of proliferating. Unlike other viruses, MyDoom also submitted these contacts as a query to search engines like Google in an unprecedented denial of service attack. With millions of search requests from corrupted computers coming in, search engines were significantly slowed and some even crashed.

    Klez
    Known as a computer virus that broke ground, Klez goes down in infamy as one of the most malicious viruses of all time. In late 2001, Klez began infecting computers through email messages that would install, replicate and then send themselves to every contact in the infected computers address book. Klez also used a tactic called “spoofing” putting the names of people from the contact list in the “From” line and sending away giving the impression that the email messages were coming from someone else. The malicious incarnation carried harmful programs that could function like a normal virus, disable antivirus software, or appear as a trojan. The worst forms of the virus rendered infected computers completely inoperable.

    Don’t be caught without an antivirus software on your computer. At the least do it for your friends and family. You don’t want to be the person sending a virus that harms their computer or their contacts.


  • Removing Virus in Your Computer

    Nowadays, there are a lot computer virus removal software that have been proven to really do the job. Some can be easily downloaded through the internet while others have to be purchased. For the downloadable ones, it will be just a matter of minutes and the anti-virus is already working on your computer.

    Before you go and download anti-virus programs, you have to look into the specific details of it. Others offer more features and keeps your computer much more protected, so choose the one which will really offer you with the best defense against computer virus.

    For the ones which have to be purchased in stores, these usually comes in CDs which will be used for installation. Most of the computer virus removal programs already include antivirus and antispyware installer.

    It is a brilliant idea to regularly scan your computer for viruses as this will make sure that your computer files and programs are really safe. There are a few common indicators which will let you know that your computer has virus.

    If your computer is not responding as fast as it should or if the programs are already working too slowly, this can be because your computer has been infected by virus. Files which you cannot access because it is corrupted can also mean that it contains computer virus. Lastly, another indication of a computer virus is when your computer constantly opens websites which you are not trying to access.

    Determine if your computer is infected or not so you can prevent more serious damage to your files and programs. If it is infected, you can easily solve this problem by using your anti-virus software and allowing it to clean up your computer virus. That is, if your computer has not been seriously damaged yet. It is also important to constantly update your anti-virus software so that it would be more efficient in eradicating virus. Whether you are using an anti-virus program which is downloaded or installed through a CD, always make sure that you have the latest version. This is best for detecting even the latest viruses.

    Computer virus removal is easy if you just have enough knowledge on computers. Search through the internet first for the best names when it comes to anti-virus software.


  • An Outline Of Computer Virus Issues

    Computers have incredible capabilities. They can accomplish great tasks, communicate clearly, make things move and think beyond human measure. Computers have become like humans in nearly every conceivable manner, so it’s no surprise that computers can also get sick.

    The computer revolution first began picking up speed in the late 1980s. Since then, it has evolved to be a vital element in our society, our corporate and our personal lives. Computers have become part and parcel to virtually everything we do day in, and day out. But with all good comes a little bad. Some users have maliciously created computer viruses that have grave effects. The range of computer viruses existing in our modern networks has a huge prominence in our lives, because of all the ways we depend on computers. Despite our need for dependable computers, some people have nothing better to do but exercise their computer knowledge in a destructive way, creating computer viruses.

    The first computer virus, called “The Brain”, was created in 1986. The Brain is a boot-sector virus, which occupies unused space on the disk to eliminate further use of memory space. After it was created, The Brain quickly spread worldwide in 1987. The Brain virus was considered first to use stealth techniques, making the virus difficult to detect.

    On November 1, 1987 another virus appeared. The Lehigh virus was named after Lehigh University, the place where this particular virus was first discovered. One Friday the thirteenth, in December of that same year, the Jerusalem virus was discovered at Hebrew University. This virus has also gone by the names “ArabStar”, “Friday the 13th” and the “Black Window”. This is one of the oldest and best-known computer viruses in the world.

    Two more viruses surfaced in 1988: the Stone, which was the first bootstrap virus, and the Internet Worm. The Internet Worm caused mayhem in the corporate world as it crossed the United States overnight through a series of computer networks. Then in 1989, the Dark Avenger was introduced. This was a fast-infector that possessed the capability to infect new files despite the presence of anti-virus software. The Dark Avenger computer virus was designed to damage a system slowly. The virus would go unnoticed at first, and damaged files would not be backed up. Slowly it would consume more and more of your computer until it had created permanent damage.

    Computer manufacturers and software engineers began the public war against computer viruses around 1990. Corporations began to respond to growing public concern and the number of anti-virus products began to rise. The threat of computer viruses was finally taken seriously. McAfee, IBM, Digital Dispatch and Iris all introduced their anti-virus products and software in 1990. Despite their efforts, computer viruses grew faster, stronger and sneakier. Symantec Norton anti-virus was introduced was introduced in 1991.

    The introduction of Windows 95 brought both relief and discomfort to anti-virus companies when it was released in 1995. At that time, most common computer viruses were still boot viruses that worked on DOS, but couldn’t replicate on Windows 95. Then micro viruses were discovered in late 1995. These computer viruses performed in the MS-Word environment, rather than DOS. Again, the anti-virus industry faced challenges to fight against these new batches of viruses. With the introduction and growing popularity of the Internet in the late 1990s, viruses began to spread at a much faster rate.

    Throughout 1998 there was no lessening of computer virus attacks MS Office, MS Windows, MS Office and network applications. New viruses continued to appear, and computers and advanced network-to-do applications continued to be affected. In 1999, another virus appeared, infecting computers using Microsoft Word. This computer virus may have been passed on via MS Outlook, or through Outlook Express e-mail programs.

    The “Loveletter” virus, also known as “Love Bug” and the “I Love You” virus, is believed to have struck one in five PCs worldwide, making it the most widespread and the most costly computer virus the world had ever seen. The “I Love You Virus” created panic and discord around the globe. The virus was transferred by e-mail. When the receiver opened the attachment, the virus was automatically sent to everyone in the user’s address book. The “I Love You” computer virus spread at a dizzying rate of speed.

    As long as we continue to use the Internet and share computer files, we are at risk of catching computer viruses. Even today, more and more viruses are still being discovered, leading to big problems for all users, and creating ongoing dilemmas for the creators of antivirus programs.

    Like people, getting sick is an unfortunate fact of life for computers. Using up to date anti virus software is a sort of preventative medicine, helping to keep computers healthy and computer viruses at bay.