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TabBarInteraction, a legitimate open source project that makes it easier for developers to animate iOS tab bars based on user interaction. An Xcode project is a repository for all the files, resources, and information needed to build an app.

Walking on eggshells

Alongside the legitimate code was an obfuscated script, known as a “Run Script.” The script, which got executed whenever the developer build was launched, contacted an attacker-controlled server to download and install a custom version of EggShell, an open source back door that spies on users through their mic, camera, and keyboard.

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