WikiLeaks on Thursday released new documents it says describe hacking tools used by the Central Intelligence Agency over the past decade to infect Apple Inc. devices.

The fresh cache of documents raised eyebrows, describing sinister-sounding software such as “DarkMatter” and “Sonic Screwdriver” that is seemingly hard to detect and can remain on a Mac even after the hard drive is erased. Security experts, though, said these methods have long been known within the community.

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