Developers tricked into using XcodeGhost software that infiltrates legitimate apps in an attempt to steal data
Apple has taken down several apps after hundreds were found to have been compromised by a major attack on the App Store.
In the first significant security issue to affect the usually-watertight App Store for the iPhone and iPad, many were found with malicious "XcodeGhost" code inside of them.
The code found its way into the apps because developers had been tricked into using a modified version of Apple's official software for creating apps, known as Xcode. The code was deeply embedded in the apps, which made it through the Apple reviewers who check every app before they are made available to download.