Wow, apparently he designed this when he was only 14 years old, and it was good enough to go undetected for another 14 years. Yet another example of why locking down open ports should be taken seriously.
The government typically makes grandiose statements that sound impressive and make the accused sound like the devil himself but reality is almost always an order of magnitude more mild.
Unless I hear otherwise I'm gonna assume it was just pinging back to some C&C infrastructure he owned or something like that.
[0] https://www.scribd.com/document/389668977/Durachinsky-Indict...
This makes him sound like a pedophile, but given that he created it at 14, he could watch "children" older than himself.
I'd be interested to learn if this isn't the case.
Without details all we can do is speculate.