From Dmitri Alperovitch, VP of Threat Research over at McAfee: Operation Shady RAT.
Also, and article from the BBC.
I am almost shocked at the sheer scope of the attacks and successful intrusions (after all, IT security is still not a priority on many people's list). Not only were several US government (Fed and local) entities successfully breached, but so were several US companies. Defense contractors, a real-state firm, an accounting firm, an electronics company, several IT companies, and a construction company were among the known targets that were breached. Some of these breaches lasted for over a year!
Speculation focuses on China as the most likely source of the attacks, which means there would be a high likelihood of State involvement. If this is the case, I wouldn't be surprised if several firearms manufacturers were also breached and don't know it yet. China's military has been searching for ways to gain a strategic advantage, other than the sheer size of their military, for years. Being able to obtain new gun designs and schematics that are being engineered for the US military would be a huge competitive advantage, both to the Chinese military, as well as any Chinese arms manufacturers.
Just some food for thought.