Course 42 - Mobile Malware Analysis Fundamentals | Episode 10: The Essentials of Dynamic Analysis — CyberCode Academy

Dynamic iOS Malware Analysis — Key Takeaways

Application Entry Point
- The standard entry point for an iOS application is UIApplicationMain.
- It initializes the application runtime and connects the application to its App Delegate, which manages important lifecycle events.
Method Swizzling
- Method swizzling allows an analyst to intercept or replace a class method at runtime.
- In a controlled malware-analysis environment, you can hook a method responsible for a network/environment check and alter its behavior so the application follows a different execution path.
- This can help determine what the malware would do if the expected condition were satisfied.
Languages
- Objective-C is particularly important because iOS runtime behavior and method dispatch are heavily based on Objective-C's runtime.
- JavaScript is useful when working with Cycript to interact with and manipulate the running process.

Overall WorkflowStatic Analysis → Identify Interesting Method → Run in Isolated/Jailbroken Lab → Attach with Cycript → Hook/Swizzle Method → Observe Behavior → Document Network/File/System ChangesThe important conceptual transition here is that static analysis tells you what the application appears capable of doing, while dynamic analysis lets you observe what it actually does at runtime.

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