Know what a computer virus?
Saturday, May 14, 2011
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Computer virus is a computer program that can duplicate or copy itself and spread by inserting copies of itself into other programs or documents. Computer viruses can be analogous to a biological virus that spreads by inserting itself into living cells. Computer viruses can be destructive (for example by destroying the data on the document), making computer users feel annoyed, or no effect at all.
Type
A computer virus is a general term used to describe any kind of attack against computers. Categorized by the way it works, computer viruses can be grouped into categories as follows:
Worm - duplicate itself on the hard disk. This makes the computer resources (hard drive) the worm it will be full.
Trojan - Taking the data on infected computers and sends it to the trojan maker itself.
Backdoor - Almost the same with a trojan. However, Backdoor usually resembles the files fine. For example games.
Spyware - Virus that monitors the infected computer.
Rogue - a program that mimics the antivirus program and show antiviral activity as normal, and giving false warnings about the virus. The goal is for users to purchase and activate the fake antivirus program and make money for those rogue virus makers. Also rogue can open security holes in computers in order to bring in other viruses.
Rootkits - A virus that works like an ordinary computer system working alone.
Polymorphic virus - A virus that likes to beubah changed so as not to be detected.
Metamorphic viruses - viruses that change the encoding itself to be more difficult to detect.
Mobile Viruses - A virus that runs on mobile phones, and can cause various effects, ranging from cell phones damage, steal data in mobile phones, to make calls in secret and spend credit cell phone users.
How it works
Computer viruses generally can damage the computer software and can not directly damage the computer hardware but can cause damage by over-loading a program that forces the process to a specific device. Negative effects of computer viruses is to multiply himself, which makes the computer resources (such as memory usage) to be reduced significantly. Nearly 95% of computer viruses based on the Windows operating system. The remaining attacking Linux / GNU, Mac, FreeBSD, OS / 2 IBM, and Sun Operating System. Malignant virus that will damage the hardware.
reference source: Wikipedia
Type
A computer virus is a general term used to describe any kind of attack against computers. Categorized by the way it works, computer viruses can be grouped into categories as follows:
Worm - duplicate itself on the hard disk. This makes the computer resources (hard drive) the worm it will be full.
Trojan - Taking the data on infected computers and sends it to the trojan maker itself.
Backdoor - Almost the same with a trojan. However, Backdoor usually resembles the files fine. For example games.
Spyware - Virus that monitors the infected computer.
Rogue - a program that mimics the antivirus program and show antiviral activity as normal, and giving false warnings about the virus. The goal is for users to purchase and activate the fake antivirus program and make money for those rogue virus makers. Also rogue can open security holes in computers in order to bring in other viruses.
Rootkits - A virus that works like an ordinary computer system working alone.
Polymorphic virus - A virus that likes to beubah changed so as not to be detected.
Metamorphic viruses - viruses that change the encoding itself to be more difficult to detect.
Mobile Viruses - A virus that runs on mobile phones, and can cause various effects, ranging from cell phones damage, steal data in mobile phones, to make calls in secret and spend credit cell phone users.
How it works
Computer viruses generally can damage the computer software and can not directly damage the computer hardware but can cause damage by over-loading a program that forces the process to a specific device. Negative effects of computer viruses is to multiply himself, which makes the computer resources (such as memory usage) to be reduced significantly. Nearly 95% of computer viruses based on the Windows operating system. The remaining attacking Linux / GNU, Mac, FreeBSD, OS / 2 IBM, and Sun Operating System. Malignant virus that will damage the hardware.
reference source: Wikipedia
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Computer
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