I think the term "leaders" is used very loosely here since last I checked they weren't an organisation with "leaders"
I think they're trying to put the blame on anonymous. They found this and thought, we'll blame it on them:
"police found a large quantity of software programs specifically designed to infect third-party computers. The suspects encoded their communications and penetrated nearby secure Wifi networks, since two of the suspects did not even have an Internet connection at home, the police said."