Methods Of Dissemination
What distinguishes the virus worms, and proper mode of replication and dissemination: a virus is a snippet of code that can not be run separately from a program host, while a worm is a stand-alone application. Also, some worms spread by exploiting security vulnerabilities, and therefore do not depend on whether the trick user to be performed.
Before the widespread use of Internet connections, the means of spreading the virus mainly from one machine to another was the exchange of floppy disks containing infected files or virus boot. The preferred vehicle of infection was instead represented today by e-mail communications and peer to peer networks (e.g., eMule).
In computer systems is customary to use the Windows registry keys necessary to enter into the new programs created ad hoc with the programmer of the virus that start automatically at startup. One of the weaknesses of Windows is its own registry. There are various programs to keep an eye on the dangerous in the Windows registry keys, one of which is Absolute Startup, which at regular intervals of time scans of areas at risk register to see if a new virus or crash program was added in those keys.
False Virus
The lack of knowledge of the mechanisms of spread of viruses and the manner in which the topic is often the media allow the spread of both viruses as virus hoax, also called the hoax: they are messages that warn of the spread of a terrible new phantom virus tones catastrophic and invite the recipient to forward it to as many people as possible. It is unclear how these false alarms are harmful as they increase the amount of spam and spreading false information, or even harmful.
Virus Yesterday And Today
Today, there are very few malicious code which can be attributed, really, the name of the virus. A time when the exchange took place via physical media file, usually a floppy drive, these were to be a vehicle of infection and therefore it was important, wanting to create a virus that spreads, that this was as silent as possible. They were written in assembly language, which makes them small, high performance yet insidious following the rule: if you do not know what to look figured if you know how to find it.
Speaking today of viruses, entering into details, but you make an error. It is aimed at, the term virus, all the malicious code can cause damage to a user. The exchange files via physical devices such as floppy disks, the almost total abandonment of self to make a boot procedure and recovery, has rendered obsolete the old concept of viruses, malicious code a little difficult to locate.
Nevertheless, the machines are increasingly powerful, consumers increasingly less and less prepared, broadband for all. The information travels from one end of the globe without physical constraints now, and so the malicious code.
The old concept of the virus was replaced with the more modern worms. The worms are not written in assembly but in most programming languages ever higher level, in close connivance with the operating system, in almost all cases, Windows, and its vulnerability.
All this makes the writing of malicious code much easier than before and the large number and diversity of worms with their variants is an obvious example. These new types of infections entering the system almost always alone exploiting the vulnerability, and they do not do much to hide, rather than replicate like worms infect files, which is a more complex and now abandoned.
Lately, they have become very fashionable and highly destructive payload, or which expose the victim to other types of attacks. The life of the worm is generally shorter than that of a virus because they identify, thanks to the Internet, has become a big business now more than in former times and is probably why more and more often leads developers to want a life span shorter for the machine that houses it, and some hair in less user.
The worms are acting increasingly as retrovirus and, wanting to run faster than the patch that corrects the vulnerability that allowed it to spread, often you are to update the antivirus when the code has already taken hold in the system.
Exchange Of Virus
Many virus programmers today, but particularly in the past, exchanged sources of virus to understand new programming techniques. Many exchanges of virus occurred through websites called VX. VX means Virus eXchange. Nowadays sites (at least public ones) dedicated to VX have been few, but we think that there are underground sites that contain databases accessible only to crew recent virus writer. You can get a virus through email, which installs the virus even if they are not open.
Continued…
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