"Apple confirmed on Sunday that a tool used by software developers for the company’s devices was copied and modified by hackers to put bad code into apps available on the App Store.From Malicious Code Infiltrates Some Apple App Store Apps in China (Re/code):
So far about 40 apps with malicious code, or malware, have made it into the App Store, said researchers at Palo Alto Networks, an online security company that is investigating the incident. In a blog post, the security company said the breach could potentially affect hundreds of millions of users."
"Apple provides developers with secure tools for creating mobile apps, however some developers are believed to have a counterfeit version because it downloaded faster, according to a person familiar with the matter. These developers ignored warnings on their computers that they may be downloading malicious software."Apple Confirms Discovery of Malicious Code in Some App Store Products - The New York Times