My friends where claiming that it didn't say that i could choose (and they considered the nekro virus to be too good if i got to choose)
I'm all too familiar with friends who think things like that as long as they aren't playing the race in question. The Nekro virus does have a very powerful advantage in their ability to copy technology, but they also have a very serious weakness in their inability to participate in the political side of the game. They also can't get technology by any other means; they just get CCs instead.
Hopefully someone else around here can give you a more definitive answer than mine, but I would be inclined to say the race should be played a few times before people start deciding what is or isn't "too good." Until then, if they can't produce a rule that says it's drawn randomly, I don't think it should be drawn randomly.
After all, drawing randomly would require you to pull out ALL the technology cards from your deck that your opponent has and you don't, shuffle them up and draw one. That's a pretty involved process to not be mentioned anywhere in the rules, at least in passing.