News Corp has disclosed today that one of its systems had been subject to “persistent cyberattack activity” The attack was discovered sometime this January but it isn’t until today that the news conglomerate has publicly disclosed the attack via a filing rather than a data breach notice. News Corp’s major properties include Fox News, The Wall Street Journal, New York Post, and the company’s U.K. news operation. The cyber risk insurance policy it has in place may not be sufficient “to cover all losses from any breaches””]