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About 10-15 years ago, the next "big deal" in anti-virus protection was the polymorphic virus, which mutated, and everyone was saying that it would be hard to defend against because of that.

Yet, here we are, 10-15 years later. What happened? How were defenses found? Are anti-viru still using signatures? If so, where's the defense?

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closed as off topic by studiohack Jan 8 '12 at 5:33

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I'm guessing that they found it difficult to do the millions of experiments necessary to select a viable mutation, without generating "immunity" in the process. –  Daniel R Hicks Jan 8 '12 at 4:29
virus writers stopped trying to be clever, and stopped trying to break things for fun. The modern virus is primarily designed as a money making tool, rather than a maliciously fun exercise in coding ;p –  Journeyman Geek Jan 8 '12 at 4:29
You might find a better answer by asking the question (after searching) over at security.stackexchange.com for example security.stackexchange.com/questions/4619/… –  Portablejim Jan 8 '12 at 4:44

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