When I first started analyzing malware we stored it on floppy disks, so I know old malware when I see it. And, oddly enough, lately I’m seeing more and more of it – a phenomenon being driven, I believe, by the ongoing proliferation of FUD crypter services—FUD as in “Fully Undetectable.” I think this is evolving to the point where it will be an issue for the security industry.
http://feedproxy.google.com/~r/Securityweek/~3/rSqpN6p4Sn0/fud-crypters-recycling-old-malware
