The spider in the web

"The spider in the web" means:

1. A tricky and devious enemy that is hard to imagine or conceptualize since they are anonymous individuals and\or organisations or coball of them at the hart of a web of deceit and conspiracies.

• Sources: http://www.economist.com/node/788472 and https://en.wikipedia.org/wiki/The_spider_in_the_web.