I wrote an AV Scanner (for the lulz) in the early 1990's and ended working at Symantec for my sins. Some of the programs were seriously well coded with self-ha

I wrote an AV Scanner (for the lulz) in the early 1990's and ended working at Symantec for my sins. Some of the programs were seriously well coded with self-hamming code, polymorphism, multi-partite capabilities, etc. Some of my favourites were the 'Eddie' series - written by a Bulgarian guy with a liking for Iron Maiden. :)