6. Chinese Spied On Nortel
No stranger to tough times, one-time telecommunications giant Nortel Networks Ltd. was apparently deeply infiltrated with spyware from Chinese hackers for at least a decade. The reports, which surfaced in February of 2012, claimed that the hackers had "access to everything," including technical papers, R&D reports, business plans and employee emails. The attack began with the theft of seven passwords from top executives, including Nortel's chief executive. A number of employees were quoted as saying that the company made no attempts to close the breach before its assets were subsequently sold.