give a 1 minute speech on polymorphic viruses.
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Answers
A polymorphic virus is a complicated computer virus that affects data types and functions. It is a self-encrypted virus designed to avoid detection by a scanner. Upon infection, the polymorphic virus duplicates itself by creating usable, albeit slightly modified, copies of itself.The biggest problem when trying to counter the threat of polymorphic malware is often a security solution’s inability to recognize the malware’s new state after it replicates. In general, when a virus is identified by security software, it is "blacklisted," and anything that looks or behaves like it is automatically blocked. Polymorphic code makes this difficult by frequently changing itself. Even after being repelled, its new incarnation could sneak past defenses that no longer recognize it.
Comprehensive security solution packages counter this in two ways:
Heuristic Scanning: Instead of looking for an exact match to an already identified threat, a heuristic scan looks for certain crucial components the threat might share, increasing the chances of detecting and stopping a new variation of the virus.
Behavior-based Detection: This type of antivirus function analyzes the behavior of a virus rather than only looking at its actual code.
Last year, Kaspersky Lab's anti-phishing technologies utilized heuristic scanning techniques to detect almost 155 million attempts by computer users to visit phishing pages where their personal details could have been compromised.
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