Stuxnet, Duqu and Flame are not normal, everyday malware, of course. All three of them were most likely developed by a Western intelligence agency as part of covert operations that weren't meant to be discovered. The fact that the malware evaded detection proves how well the attackers did their job.
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About Mikko Hypponen
Mikko Hypponen was Finnish computer security expert. Mikko Hyppönen is a Finnish computer security expert, speaker and author. He is known for the Hyppönen Law of IoT security, which states that whenever an appliance is described as being "smart", it is vulnerable. Read more on Wikipedia →