There is a murky and much hyped emerging industry in selling intelligence about attack groups like the C0d0s0 group. Until recently, companies typically adopted a defensive strategy of trying to make their networks as impermeable as possible in hopes of repelling attacks. Today, so-called threat intelligence providers sell services that promise to go on the offensive. They track hackers, and for annual fees that can climb into the seven figures, they try to spot and thwart attacks before they happen.