“Talking of the increasingly indistinct barriers between cybersecurity and economic warfare, Sir David warned that as a possible result of increased sanctions against Russia over its behaviour ‘in Crimea and Ukraine, I would expect so-called patriotic hacker groups to attack Wall Street and the City in return.’

He additionally noted:

You have to ask yourself: have trojan viruses and worms already been planted in peacetime, so that if we ever get into a serious confrontation with a potentially hostile state, then we will suddenly discover disruption?

Admiral Rogers, who succeeded General Alexander as head of the controversial US snooping agency, offered a grim warning: ‘We’re in a world now where despite your best efforts, you must prepare for and assume that you will be penetrated.’

“

Source: The Ruskies are coming for you, NSA director tells City bankers • The Register