From what I understand the automated part is sometimes a first pass. Just to see if you are there and have something. They will then wait some period of time

From what I understand the automated part is sometimes a first pass. Just to see if you are there and have something. They will then wait some period of time and come back later with the real attack. Sort of like the war dialer from the movie wargames. Basically try everything get a list of interesting targets. Then go at them. Now some are fully automated and just try whatever exploits they are trying right then and there.