Showing posts with label Viruses. Show all posts
Showing posts with label Viruses. Show all posts

Sunday, 23 September 2012

7 Tips to Avoid Redirect Viruses

Online theft is on the increase, rootkits are used to steal passwords and data. But with a little care in your approach towards online security, you should never be touched by the redirect virus. As in all walks of life you have to stay ahead of the game. These viruses are created for a reason, and that is to make money by stealing from individuals.
Most PC viruses are simply annoying and a scan with your anti-virus program will quickly recognize them and remove them. TDSS Rootkit can be far more testing. Once infected your machine is taken over by the virus.
Disallowed is a configuration setting within TDSS which contains a list of programs that are simply disallowed; such as anti-virus and anti malware. These programs will not show any error messages, they simply will not start.
The virus is hidden; however the effects of the virus are not. When you first boot up your machine the anti-virus is configured to start, so it is very easy to miss the fact that it has not appeared in your taskbar. However it is quickly noticed when your search engine results link to unrelated sites or advertisements.
To help avoid this virus here are 7 tips.
1: Avoid Pirate sites
One of the problems of pirate sites is security. Software downloaded from these sites can contain malware, such as rootkits. When installing these programs to a PC, the user generally ignores any prompts, thus inviting the virus into the system.
A rootkit requires administrator permissions to run its payload. If User Account control is disabled or the user voluntarily gives administrator permissions, then the rootkit can begin the process of taking over the system.
2: User Account Control
User account control should always be in place. Using a PC online with administrator permissions should be avoided. Run as a limited user
3: Anti virus
Staying safe online includes having a good anti-virus, with a bootable disc. Run this disc occasionally, to check that your antivirus has not been corrupted.

4: Microsoft Updates
Make sure that you automatic updates are set to automatic. To do this goes to
Control panel> Automatic updates.

5: USB Drives.
Plugging in USB drives that do not belong to you can have risks attached. The USB drive could have an infection which could spread to your system. The problem is you have no control over any data on that USB drive.

6: Unsolicited emails.
Common sense will tell you to avoid giving sensitive information via email.

7: Internet Explore Pop ups.
A pop up showing that it has found a problem, and wishes to perform a free scan. In this situation the best thing to do is close all open programs, run a scan with your anti-virus program, and see ifitpicks up any problems. At the same time this will get rid of any malware placed in the temporary files; this could include malware from the pop up.

Redirect viruses have been with us for over 20 years, but with more and more business being conducted online, it pays to take simple security seriously.

Luke Clayhill is a writer who specializes in redirect viruses.
Luke Clayhill is a writer who specializes in redirect viruses.
You can check out his latest website at googleredirectvirus
where he provides information on rootkit viruses including the history and also how to
Remove a redirect virus

Use and distribution of this article is subject to our Publisher Guidelines
whereby the original author's information and copyright must be included.

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Friday, 20 January 2012

On Call: the Computer Doctor Diagnose Computer Viruses

How Good Is Your Antivirus?
When we hear the word virus, most of us step back and think: stay away from me, I don't want any thank you. This is mainly because we all know by now a virus is not a good thing in humans. There are many types of viruses, some do little harm like a cold, and some can even lead to death.
Just like we as human beings need to protect ourselves from any viruses (by using an antivirus such as immunizations, oral medication and protection), the same is expected with computers. A computer virus is as a human virus; it can replicate itself and spread from one computer to another (as it would from one person to another). Once your computer has a virus it can start infecting the files on your computer. If your computer is link with a network, the virus can spread through the network files. Viruses are not the only malware that can destroy your system files. Other malware such as computer worms, Trojan horses, spyware, dishonest adware and other malicious and unwanted software can cause irreparable damage to your computer.
So now you asking yourself: but how can it be? Well, on a computer, a virus is a program that can replicate itself. But first, in order to replicate itself, the virus (unknowingly to the user) is given permission to execute code and write to the computer memory. Thus many viruses latch on to an executable file that may be part of legitimate program. When the user then begins with the infected program, the virus codes are also executed at the same time. You get Nonresident viruses and Resident viruses. Nonresident viruses quickly move on to other hosts which they can infect. Resident viruses do not move on to other hosts, but load itself into the memory on execution and transfers control to the host program. This virus stays active and infects new hosts when the user uses those programs. After a while you will experience your computer working slowly (for instance when you want to open a file it takes forever).
Tip: Be careful when using memory sticks at internet cafe's computers that do not have a firewall and a good antivirus. If you put an infected memory stick in your personal computer, your computer is at risk to be infected.
So just like any human being that needs to protect himself, his computer also needs protection. And remember the better the protection, the better the result. All you need for your computer is a recommended antivirus and it will block any unwanted malware.

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Sunday, 15 January 2012

History of computer viruses

Anyone that owns a computer dreads the words "Computer Virus." A computer virus is a damaging program that gets into your system, replicates itself and continues to do damage. There are many ways that a computer virus can get into your system and there are just as many ways that a computer virus can do its damage.

The First Computer Viruses:

The first known computer virus was written in 1982 by a man named Rich Skrenta. This virus was termed Elk Cloner, and was the first computer virus to show up outside of the computer it was created in. Elk Cloner worked by attaching itself to the Apple DOS operating system and was spread to other computers by means of a floppy disk.

The next well known computer virus was a PC virus called Brain. This virus was a boot sector virus that was created by two brothers Basit and Amjad Farooq Alvi in 1986. Basit and Amjad claim to have not created this virus to intentionally infect other operating systems, but instead claim that they had created the virus and attached it to software they had written in order to prevent pirated copies of their work from being created.

How Viruses Began to Spread:

Before the Internet became so widely accessible, computer viruses were generally spread through means of hardware, like floppy disks or other removable media. Though it's hard to imagine now, people used to exchange a lot of information on floppy disks regularly, since most people did not have access to the Internet to share files. If a floppy disk was infected, it could easily spread around pretty quickly. Many of these viruses spread by attaching themselves to information and programs that were stored on these floppy disks. Other viruses were already on the disks and installed themselves onto the operating system when the disk was booted up.

As the Internet became more widely used and technology became more advanced, computer viruses continued to grow and become more common. Most computer virus threats these days come in the form of information transferred on the Internet, such as downloadable files and emails. There are even viruses that can be spread through instant messaging programs.

How to Stop Viruses:

Fortunately, as computer virus technology continues to grow, so does the technology for anti-virus systems. With proper anti-virus software in place, such as Norton Antivirus, NOD32 Antivirus, or Kaspersky Antivirus, most people never have to deal with the damage that a computer virus can cause. Computer viruses can be extremely annoying and damaging to those they infect, and history has shown us they can cause a great deal of damage very quickly. Hopefully someday, computer viruses will be a thing of the past, and only be found in the history books.


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Monday, 9 January 2012

VIRUSES AND WORMS AND THEIR REMEDY

I am quite sure that the terms viruses and worms are not so alien to you, especially the former which has been a subject of common misuse by many a people. Both items have one thing in common; they are all software which are designed to contaminate the computer and disrupt computer operations. Hence, they, in addition to others like Trojan horses, scareware, spyware, adware etc, are elements of the broader term, 'malware'. Malware is a truncation of the two words, 'malicious' and 'software' used in computer circles to describe any program intended for computer malice. However, almost all malicious software is considered as virus which should not be the case. Viruses and worms have their own points of divergence and I will try to spell out these differences.

A malicious computer program which is capable of duplicating itself on the computer and attaches itself to the files on the victim computer is a computer virus. In effect, free storage spaces on the hard disk are gradually eaten up by the virus. Additionally, computer viruses can damage a victim computer by other means including the corruption of files and folders and the deletion of files. In other circumstances, a computer virus could go to the extent of clearing off the entire data on a hard disk. Since computer viruses are clinched to files and folders, any attempt to share or transfer an infected file from computer to computer will, as a consequence, lead to the spread of the virus among the computers involved. For instance, an infected file transferred via the internet as an attachment to an email will be an effective carrier of a computer virus. Also, file transfer through a USB flash drive or a memory card can effectively spread a computer virus. A computer virus is, by far, the commonest of all malware and is relatively less dangerous as compared to others.

A worm is also a malware which is more malicious than a computer virus. This is because whereas a computer virus needs to attach itself to a file before it can spread to other computers, a worm need not attach itself to any file. Worms are capable of transmitting duplicates of themselves to any computer it is networked with. It does this with, or without, any user intervention. Some worms are designed with capabilities of creating backdoors to the infected machine which are commonly used to transfer spams. So now we are well aware of what computer viruses and worms are and what differentiates them. Now the question is, 'how do we deal with them when they attack our computer?'. The answer is simple - you need an antivirus. An antivirus is a computer software program designed for the purposes of identification, prevention and removal of all forms of malware which may pose a threat to the computer. Sometimes, I wonder why they are not called 'antimalware' since their use is not limited to only computer viruses. An antivirus may detect malware by a signature-based approach or heuristic approach. Infected files, when detected are immediately deleted or quarantined by the antivirus. There are several antivirus software available with varying capabilities and may be obtained through commercial purchase or a free download from a website and usually requires regular updating.

So therefore, if, per chance, a computer virus or worm has found its way onto your computer, just grab an antivirus and deal with it.

BRYAN WILIS is a man who is obssessed with computer issues and would like to share his views and suggestions with others.


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Wednesday, 21 December 2011

Computer Viruses and How to deal with them

- What is a computer virus:
A computer virus is a software program which is able to replicate itself and spread from one infected computer to another. The infected objects can be system, program or document files. After infecting your computer, it might slow it down, damage the contents of the infected files, mislay the data or defect your computer systems normal operation.
The virus can also use your computer to propagate illegal adverts and send spam emails that exploit security (adWare), steal your personal information such as bank account number, credit card number etc. (SpyWare). Some types of viruses might use your computer to create a bot net (virtual computer network) to attack other server systems and websites etc.

2- Type of viruses on Windows based computers:
There are a number of computer viruses that can impede the functioning of your computer. Here are some of the different types of viruses:
Trojan Horse: It is an email virus that is created by a file attached to the email. If opened, it may scour your hard drive for any personal and financial information such as your social security, account and PIN numbers. Once it has collected your info, it is sent via the internet to a hacker or thief.
Macro Virus: It is a computer virus that infects the Visual Basic language documents for applications such as Microsoft Word, Microsoft Excel etc. This type of virus can cause damage (such as removing data on the hard disk for example).
Worms: It is a program that has the ability to self-replicate itself. It can move from one computer to another and replicate itself in your computer system then spread hundreds of its copies to other computers that might cause wide spread damage.
Rootkit Virus: It is a program that is possible to cover the processes, files and data in the computer Registry (a database which is used to save Windows's system and program settings). Rootkit is usually used to hide the activities of viruses and processes which harm your computer. It is to help a hacker to control the system.
Bootsector Virus: A virus which attaches itself to the first part of the hard disk that is read by the computer upon bootup. These are normally spread by floppy disks.
Polymorphic Virus: Polymorphic viruses encode themselves in a different way (using different algorithms and encryption keys) every time they infect a system. This makes it impossible for anti-viruses to find them using string or signature searches (for they are different in each encryption) and then it goes on creating a large number of copies.
Logic Bombs: It is a program that is used to send many data to the same email address and overwhelm the system or block the server connection. It is also used to threaten others (for example mail bomb etc.).
Memory Resident Virus: This type of virus dwells in the RAM. From there it can overcome and interrupt the operations executed by the system. It can corrupt files and programs that are opened, closed, copied, renamed etc.
Multipartite Virus: These viruses spread in multiple ways. It might vary in its action depending upon where it's installed and the presence of certain files.

3- How do you get a virus and Prevention:
These are 3 common ways that your computer may get infected by viruses:
Email: You get an email from a person that contains one or more viruses. If the attachment is opened, the viruses may infect files in the computer. The viruses might also send emails to people from your email address book or email folders automatically. So, you should not open unknown attachments in emails or do a virus scanning after opening them.
Internet: If you download an exe file or a data file from the Internet or other shared networks, viruses might be transferred to your computer. Sometimes the free software programs on the Internet have viruses especially if downloading from sources such as Torrent or Usenet news groups. Therefore, if necessary, you should download files from trusted resources.
Peripheral devices: The devices such as MP3 player, USB thumb drive, Memory card or CD Rom are also means for spreading viruses. So, remember to do a virus scan for them after they are connected to your computer.

4- Symptoms of virus infection:
These are some of symptoms which may indicate virus activity:
• Your computer has unusual activity (e.g. programs crashing a lot or running slowly).
• Messages or images (unrelated to your current task) come up unexpectedly.
• A program may start up unexpectedly.
• Your firewall informs that a certain application is trying to connect to the Internet (unrelated to what you are working on).
• Your friends say that they get emails from you but you did not send any to them.
• You receive many system error announcements. (Note: This may also come from another activity such as a hardware problem or genuine system error)
• Windows does not run when you start up your computer. (Note: This may also come from a hard disk problem)
• You realise that folders and files are removed or changed.
• You find that there's an access to your hard disk (one of the small light is blinking) even though there are no programs running.
• Your web browser has abnormal indications, for example it opens an unknown web page or you cannot close the browser tabs.
• Advertising pages pop up, desktop wallpaper changes.
• Exe files occur and have the same names as the folders.
• On the right corner of your computer, there is a small symbol written "Your computer is infected" or "Virus Alert" etc.
• When you open an USB thumb drive, unknown files such as Autorun.inf, New Folder.exe etc. appear.
• Cannot press Control + Alt + Delete (Task Manager) and you are warned that Administrator banned it.
• Folder Options disappears.
• Your computer keeps restarting when you try to shut it down.
• You cannot log in your Windows account with the right logon details.

What to do when infected:
? Make sure that your Antivirus software is the latest update. If necessary, download the update from another computer and update it manually.
? Disconnect from the Internet or Local Area Network (LAN).
? If Windows is not running, start it in Safe Mode (when turning on your computer, keep pressing F8 as soon as the computer starts running, then choose 'Safe Mode' from the Menu).
? Run a full Anti-Virus scan.
? If your computer is quite infected but you have important files or documents on it, do a full scan with your updated Antivirus software. If it finds viruses, delete all of them then open each ancillary disk (USB, Thumb drive etc.) and look for Autorun.inf files and remove them. Afterward, restart your computer.
? If you have any difficulties with finding a way to remove bad programs, refer to your Internet Security Software Supplier to look for an essential dedicated tool to remove them.
? If you find a bad program, follow the instructions of your Internet Security Software Supplier. Good Security software will provide with options such as disabling infected files, isolating possibly infected files, Worms and Trojans removal.
? If you do not have any important files on your computer disks, format the disk and then re-install your Windows and applications. This is quite an extreme and lengthy process and it's recommended to back up your computer settings prior to commencing. When finished, do not open on any ancillary disks (USB, Thumb drives etc.) yet, install the Antivirus software, do a full scan, find Autorun.inf files and remove them. Restart your computer after that.
? If the Anti-Virus software does not find anything, your computer is possibly not infected. Check your hardware and software that is installed on your computer meets the hardware specifications of the Operating System. Delete unnecessary or unwanted programs to save resources and ensure you have updated your Windows OS via Windows Update.


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Tuesday, 20 December 2011

Do You Know How To Avoid Computer Viruses

In life,we always and dealing with computer, and every day that we were using the computer looking for some of what we want, but we seldom to protect it, even if the maintenance, estimate is it until it fell ill to maintain.

Today, there are lots of many viruses that could assault your individual computer - the internet is rife with them, plus they may be very easily contracted for individuals who don't know the way in which to steer obvious of them. Let's research at how you can safeguard your individual computer from viruses merely and easily.

Don't obtain something on-line for individuals who aren't good in the source. Even for document sharing in between companies, you must be certain how the sharing customer consists of a stable method that is no worth from viruses preceding to starting to exchange data files or available a instant link.

Don't obtain e-mail attachments if you're not good concerning the sender. the unbelievably top method to begin this could be to turn away the automated launching of your e-mail client. It's top to look at your e-mail on-line precisely where you aren't downloading anything, such as artwork from emails, onto your computer. You shouldn't available any attachments or permit artwork until you are good the document is safe and seem for the computer. look at the document attachment extension - if it's a .pif or .scr extension near to the end, odds are it is typically a virus. enjoy out for .exe files, that are executable data files as well, that extension is definitely an extra common outlet for viruses.

Don't just believe in your anti virus program. They are only awesome for acknowledged viruses, but for individuals who are attacked with an not known virus then your individual computer may be at risk. be good that you just update your antivirus usually to retain abreast of new viruses and protected in opposition to them. However, for individuals who aren't good if something is typically a virus or not, scan it anyway - it's worth the additional time to look at the document preceding to opening it in your computer. Use a remarkable anti-spyware plan to help rid your individual computer of products that send out individual details toward internet that could potentially be opening holes within your method that you just are unaware of.

Be mindful of your settings. founded up your individual computer to be certain that it doesn't start files, obtain updates, do safety checks, fill HTML webpages or help save cookies without the need of your permission for every solo instance.

Install a firewall in your individual computer and in your LAN. for individuals who don't have one, change operating products toward most latest that will can be found using a produced in fire wall. Also consist of the hardware firewall in your individual computer as well - a router that is uncomplicated to founded up and assists to safeguard your computer.

Take some time to know about how viruses and worms can assault your computer. at any time you are armed with knowledge, you can safeguard your individual computer even further. A effortless research near to the internet for information and details on how viruses hold out will accomplish cause adequate information and details to provide you with a essential understanding.

Watch the kids on the Internet. Don't let them utilize it carte blanche - this can open up holes in your computer as kids have a tendency to click on advertisements without thinking about the ramifications of clicking "ok" on a webpage.

Protecting your computer is something that only you can do - no one else is going to do it for you. It's important to arm yourself with knowledge to protect your computer on your own to ensure that your computer is as solidly protected as possible. Finally, I hope that you finish reading this article may well protect their computer, I wish you every success, happy day.


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Friday, 18 November 2011

Viruses: The Best Thieves Today!

Viruses have become a direct route to quick/easy money by hackers and thieves alike. By confusing end-users into thinking that they are more infected than they actually are, viruses manage to extract money from innocent computer users that they most likely will never see again. That being said, in this article I would like to provide some basic information about these threats in order to build awareness in general computer users.

First, if a message or pop-up on your computer asks for money, you should always do research before doing anything. In fact, a safe habit would be to never send money online unless you're on a trusted website that you know is legitimate from experience. This should be in the back of your mind as you approach the rest of the information in this article.

To provide a brief overview, viruses can affect all sorts of levels of functionality on a computer. The viruses I am addressing in this article inform the end-user that their computer is infected with viruses that are not actually present (other than the virus itself!) in order to cause panic. The end-user is offered a solution for some amount of money, which will provide them with nothing in the long-run except for a continuation of the virus they already have. This is not a virus cleaning

If a virus is named for a specific function, it is more than likely fake. Viruses are not usually named by the specific thing that they target, so if a pop-up informs you that an "identity.theft.virus" has infected your computer, it is most likely fake. Some of these virus names are very comical, so approach them with a sense of humor for the best results.

"Many viruses now falsely tell users that their hard drive is dying or another hardware problem is present," said a representative from a Southfield computer repair shop. In my years of experience, I've very rarely, if ever, experienced an accurate assessment of hardware condition from within the operating system. If the errors are very specific, it's probably a fraud. Even further, if something has misspellings or just plain doesn't look right, it's also probably illegitimate.

While there are plenty of other ways that viruses affect computers today, this is probably the most common way that I've witnessed in my line of work. The most important thing is to be careful whenever something unfamiliar pops up on your computer. If you get infected, do not panic and immediately shut off your computer and take it to a trusted computer repair store. You risk losing money and time if you attempt to fix something you're not comfortable with. In future articles, I'll address safe-surfing habits to avoid viruses altogether.

I have been a technician for over 10 years, focusing on efficient, easy-to-understand computer repair. I strive for people to have at least a minor conceptual grasp of how their computers work in order to permit the best possible computing experience. I currently perform computer repair for a company in the Metro Detroit area.