According to Sandra Joyce, Mandiant head of global intelligence, these figures are not so surprising given how sophisticated some Chinese threat actors have become. Speaking with Infosecurity, she said that “while they started with noisy, easily detectable spear-phishing campaigns that put them in a tier 2 or tier 3 category in the 1990s and 2000s, most Chinese APTs are now top tier without a doubt.

Source: Infosecurity