Investing.com - The hacking of HBO highlights the increasing threat of cyberattacks for companies’ operations. The (NYSE:Time-Warner) unit on Monday confirmed it had been the victim of a cyberattack. “There has been a cyber incident directed at the company which has resulted in some stolen proprietary information," HBO Chairman Richard Plepler told employees. HBO did not detail what had been hacked. Media reports say the script of a future episode of the fantasy series “Game of Thrones” had been targeted.Time-Warner is due to release its June quarter earnings report on Wednesday before the market opens.The company is forecast to report earnings per share of $1.19 on revenues of $7.32 billion.