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What is Antivirus? Antivirus or Anti-Virus Software

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What is Antivirus? Antivirus or Anti-Virus Software What is Antivirus? Antivirus or Anti-Virus Software What is Antivirus? Antivirus or Anti-Virus Software

What is Antivirus?

What is Antivirus

Antivirus or anti-virus software (often abbreviated as AV), sometimes known as anti-malware software, is computer software used to prevent, detect and remove malicious software.

Antivirus software was originally developed to detect and remove computer viruses, hence the name. However, with the proliferation of other kinds of malware, antivirus software started to provide protection from other computer threats. 

In particular, modern antivirus software can protect from malicious browser helper objects (BHO), browser hijackers, ransomware, keyloggers, backdoors, rootkits, trojan horses, worms, malicious LSPs, dialers, fraud tools, adware, and spyware. 

Some products also include protection from other computer threats, such as infected and malicious URLs, spam, scam and phishing attacks, online identity (privacy), online banking attacks, social engineering techniques, advanced persistent threat (APT) and botnet DDoS attacks

Identification methods

One of the few solid theoretical results in the study of computer viruses is Frederick B. Cohen's 1987 demonstration that there is no algorithm that can perfectly detect all possible viruses.

However, using different layers of defense, a good detection rate may be achieved.

There are several methods which antivirus engine can use to identify malware:

What is Antivirus

Sandbox detection: is a particular behavioral-based detection technique that, instead of detecting the behavioral fingerprint at run time, it executes the programs in a virtual environment, logging what actions the program performs. 

Depending on the actions logged, the antivirus engine can determine if the program is malicious or not. If not, then, the program is executed in the real environment. Albeit this technique has shown to be quite effective, given its heaviness and slowness, it is rarely used in end-user antivirus solutions.

Data mining techniques are one of the latest approaches applied to malware detection. Data mining and machine learning algorithms are used to try to classify the behavior of a file (as either malicious or benign) given a series of file features, that are extracted from the file itself.

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