Krebs is a super impressive guy in my opinion, and him being able to do something is not where my bar for easy starts. His investigative abilities and network of sources I think is unrivaled in his domain.

Unrivaled among journalists when it comes to cybercrime investigations, absolutely. He's good at what he does and also has access to a lot of tools and helpful contributors. But if you follow the steps, which he lays out very clearly, it's pretty apparent that identifying the perpetrators wasn't rocket science, and that it probably wasn't very hard for the FBI.

Oh you're right! I had forgotten about this.