[hackeraccount]

I think this is probably the right answer.

The only thing that makes me think this was amateurs/criminals instead of professionals is that I tend to think that professionals are more interested in post attack security.

So if the gate was closing an amateur would say, "Act now! Let's get what we can!" A professional would say, "This is all going to come to light real soon - our exploit won't be read and there's a high chance of this all falling apart. Pull out everything, cover our tracks to the degree we can and find another opportunity to pull this off."

But then again I also think on professionals would work an exploit that takes years. Criminals by their nature want a quick payout (If I had the patience for a long con I'd just get a job) a motivated individual amateurs (i.e. crazy people) rarely have a wide enough skill set.