[matt_wulfeck]

How many IoT devices are out on the public internet at the moment?

and for the existing IOT devices, are they the same thing, or were different exploits used for different devices?

[yashinm92]

How many on the public internet? Too many. Here are close to 100k IP cameras on the public internet: https://www.shodan.io/search?query=ip+camera

Again, the speculation that it is IoT devices is unfortunately just that. However massive compromise of internet connected embedded device is not new: http://internetcensus2012.bitbucket.org/paper.html