The Russian Business Network is active in Sochi. Lookingglass sees significant criminal assets in Sochi and warns against using 4G networks. Not the same as the NBC story -- but still a cautionary note.
Meanwhile, it looks like the Target hack may have come in through the HVAC. According to Computer World "hackers stole login credentials belonging to a company that provides it HVAC services and used that access to gain a foothold on the company's payment systems."