LAS VEGAS (AP) — The hackers are a tight knit group, 10 or 11. They live in a Russian town, and have real jobs. But in their down time, the cybercriminals have spent the past seven months gathering a hoard of personal data, stealing 1.2 billion user names and passwords in a series of Internet heists affecting 420,000 websites, according to Alex Holden, Chief Information Security Officer for Hold Security, whose firm uncovered the breach.