Given the state of surveillance technology today, it's pretty hard for me to believe that any large hacking organization manages to fly under the radar of their

Given the state of surveillance technology today, it's pretty hard for me to believe that any large hacking organization manages to fly under the radar of their governments for very long. You need infrastructure, equipment, and financial capabilities to pull off what these groups manage. These groups are either working explicitly with governments, or their leadership has been approached by domestic police forces and are strong-armed into focusing their attention on specific organizations.