I would like to add that NATO is an alliance of nations. Generally, NATO relies on individual nations to bring capabilities, including cyber capabilities, to support NATO. In a lot of these instances, dealing with these cyber-attacks is done on a national level by individual nations.
NATO gets involved when we get into an article 4 or an article 5 discussion about a particularly severe cyber incident that might warrant a NATO response. NATO would look to nations that had those capabilities, including Canada, to potentially respond.