Probably to challenge the country's dominance in dessert wine.

It's just an internet exposed network, people target those all the time anywhere.

Just because it is critical infrastructure doesn't mean its a geopolitical thing.

Portugal is one of the founding members of NATO[0]. The implication here is that russians are alledgely behind this attack.

[0] - https://www.nato.int/cps/en/natohq/declassified_137725.htm