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Certified Ethical Hacker (CEH) Practice Question

During a mobile penetration test you need to trace Objective-C method calls inside a third-party banking application that is installed on an employee's non-jailbroken iPhone running iOS 15. You have the device's UDID and access to a macOS workstation with Xcode and an Apple developer account. Which technique will let you instrument the app at run-time without first jailbreaking the device?

  • Edit the app's Info.plist to disable code-signing enforcement and reinstall the modified package without resigning.

  • Install Cydia Substrate through Cydia and use MobileSubstrate hooks to intercept the app's Objective-C methods.

  • Repackage the IPA with Frida Gadget, re-sign it using a developer profile in Xcode, and sideload it to the device for dynamic instrumentation.

  • Enable SSH over USB and set the DYLD_INSERT_LIBRARIES variable to inject a custom dylib when the app starts.

Certified Ethical Hacker (CEH)
Mobile Platform, IoT, and OT Hacking
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