Mobile Application Security

Mobile devices are everywhere. We use them to bank, communicate, shop, and store some of our most sensitive personal data. For a red teamer, mobile applications are among the most interesting and rewarding targets to assess. Yet mobile security is often treated as a niche skill, something to pick up later, after web applications and network testing. This room is here to change that.

In this room, we will walk through the fundamentals of mobile application penetration testing together. We will look at how mobile applications are built, how testers approach them, and what kinds of vulnerabilities they look for. Rather than focusing on a single platform, we will keep things broad so that the skills and knowledge you build here apply regardless of the device you use.

Mobile application testing is not the same as web application testing, even though the two share some common ground. A mobile application has its own package format, its own permission model, and its own set of components that interact with the operating system and with each other. Understanding these differences is what separates a tester who can find surface-level issues from one who can properly pull a mobile application apart.

By the end of this room, you will have a solid foundation to build on, whether that means moving into platform-specific testing, picking up dedicated tooling, or tackling mobile security challenges on TryHackMe.

Learning Objectives

• Understand what mobile application penetration testing is and why it matters from a red team perspective
• Know how mobile applications are structured and what is inside a package
• Follow a clear methodology when approaching a mobile application test
• Perform static analysis on a mobile application package to find vulnerabilities
• Understand how dynamic analysis works and what techniques it involves
• Recognise the most common vulnerability categories found in mobile applications
• Apply static analysis skills in a practical CTF-style challenge

Prerequisites

Before starting this room, we recommend completing the following:

• Linux Fundamentals 
• Web Fundamentals
• Burp Suite: Module

Some familiarity with how web applications communicate over HTTP and HTTPS will help you get the most out of the dynamic analysis task. If you have not used Burp Suite before, do not worry: this task is conceptual and no hands-on proxy work is required.