Brute force attacks and reconnaissance attacks were also experienced with higher frequency in on-premises environments.

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It was once believed that computers could never beat the best human at chess, because computers perform very inefficient brute force attacks on problems, instead of relying on intuition and hierarchical structures like our brains do.

FORBES: Machines Will Outsmart Humans. We Better Be Ready

Persistent attacks are the brute force way of getting the job done but the silent and slow hacks are the ones that we need to get the information.

FORBES: Still Recovering from Largest Cyber Attack on Record, U.S. Military Creates 'Cyber Unit'