TECHNICAL OF COMPUTER SCIENCES

Difference between viruses, worms, and Trojans

2009-06-30T18:57:00.001-07:00

Difference between viruses, worms, and Trojans

Site : http://ilmuteknikkomputer.blogspot.com
e-mail : Yoga.hot@hotmail.com

this article take from : http://www.symantec.com/avcenter/home_homeoffice/index.html

What is a virus?
A computer virus is a small program written to alter the way a computer operates, without the permission or knowledge of the user. A virus must meet two criteria:

It must execute itself. It often places its own code in the path of execution of another program.
It must replicate itself. For example, it may replace other executable files with a copy of the virus infected file. Viruses can infect desktop computers and network servers alike.
Some viruses are programmed to damage the computer by damaging programs, deleting files, or reformatting the hard disk. Others are not designed to do any damage, but simply to replicate themselves and make their presence known by presenting text, video, and audio messages. Even these benign viruses can create problems for the computer user. They typically take up computer memory used by legitimate programs. As a result, they often cause erratic behavior and can result in system crashes. In addition, many viruses are bug-ridden, and these bugs may lead to system crashes and data loss.

What is a Trojan horse?
Trojan horses are impostors—files that claim to be something desirable but, in fact, are malicious. A very important distinction between Trojan horse programs and true viruses is that they do not replicate themselves. Trojan horses contain malicious code that when triggered cause loss, or even theft, of data. For a Trojan horse to spread, you must invite these programs onto your computers; for example, by opening an email attachment or downloading and running a file from the Internet. Trojan.Vundo is a Trojan horse.

What is a worm?
Worms are programs that replicate themselves from system to system without the use of a host file. This is in contrast to viruses, which requires the spreading of an infected host file. Although worms generally exist inside of other files, often Word or Excel documents, there is a difference between how worms and viruses use the host file. Usually the worm will release a document that already has the "worm" macro inside the document. The entire document will travel from computer to computer, so the entire document should be considered the worm W32.Mydoom.AX@mm is an example of a worm

Welcome to Technical of Computer Sciences

2009-05-29T18:14:00.000-07:00

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Virus way's in Flashdisk

2009-05-28T22:57:00.000-07:00

Virus can take flashdisk as vehicle
Writer : Yoga_ke2en
update : 29 mei 2009
link : http://ilmunyateknikkomputer.blogspot.com

Do you know what the virus computer is (the call when there is a file that we don't like it in our computer and make mulfunction the computer activity), it's the file who there is design and programs by the hacker to make what the maker wants. There are many motif to mading the virus, some make to know what the good they are in the cyber world, some for complicated purpose like sabotage.
Like we know the virus need the vehicle to do it jobs to the computers, there is flashdisk the generally storages today. From flashdisk the virus can be easely to going anycomputers when the flashdisk plug to the computer, and the virus files can not to be see by the user because the virus make super hidden from the setting panel.