According to this article, voting machines were targeted, but it seems very unclear as to whether or not those attempts were successful or had any effect on anything at all. Previous reports have all concluded that no votes were actually affected by hacking, and this article strives to imply that votes were affected but has no facts to back that up.
I would assume that attempts to gather information on and hack into voting machines happen all the time, by both state actors and private individuals. They key is whether or not such attempts are successful.
