PARIS (AP) — Researchers at U.S. antivirus firm McAfee say the cyberattacks that have hit Saudi Arabia over the past few months are continuing, revealing new details about an unusually disruptive campaign.

Speaking ahead of the blog post 's publication Wednesday, McAfee chief scientists Raj Samani said the latest intrusions were very similar, albeit even worse, to the malicious software that wrecked computers at Saudi Arabia's state-run oil company in 2012.

"This campaign was a lot bigger," Samani said. "Way larger in terms of the amount of work that needed to be done."

It's a striking claim....