What we don't understand is how profitable for the hackers this would actually be. I mean CPU mining is pretty much worthless at this point (too weak to handle the workload required) which is why we use GPUs. So how many CPUs do hackers have to jack combined for their operation to be worthwhile?
Also, do we have any data on what the biggest coins being mined are?
Just some food for thought...
I don't know, but they are doing it for certain coins. Maybe not the big hitters like BTC, but they are doing it because it works... One commenter has a coin (ETN) example using mobile CPU..