And that was it. It was unleashed.

The rows of supercomputers buried deep underneath an office building in London came to life, humming softly as their CPUs prepared the extremely complex program that was about to be transmitted to all of the WiFi networks within a twenty-kilometre radius.

In seconds, it was ready. The powerful transmitters began to transmit code at a rapid rate. Along with this code was a set of simple instructions:

TRANSMIT CODE TO ALL WIFI NETWORKS WITHIN RANGE. DOWNLOAD CODE TO ALL COMPUTERS CONNECTED TO WIFI NETWORK. REPEAT. UPLOAD CODE WHEN CONNECTED TO NEW WIFI NETWORK

Its creators just had to sit back and wait for the code to do its job.