Do you know why mobile penetration testing is the only reliable way to find the security gaps in your apps?
Your app is safe, right? After all, it passed Apple's review process. Google Play accepted it without any issues. Your automated security scanner even gave you a clean report. It's natural to assume you're secure.
But that assumption costs businesses millions of euros every year.
You see, the mobile security systems designed to protect users actually create a false sense of safety. App store reviews, sandboxing, and certificate requirements prevent the most obvious threats. However, they don't do much against determined attackers who understand the inner workings of mobile apps.
7ASecurity tests mobile apps professionally. We also train other cybersecurity professionals to do the same. What strikes us most isn't the complex nature of the vulnerabilities we find. It's how often they appear in apps that have passed every automated check available.
What Mobile Penetration Testing Actually Means
Mobile penetration testing is the practice of attacking a mobile app to find weaknesses before criminals do.
A proper pentest looks at the application from multiple angles. We test:
- How it stores data on the phone.
- How it communicates with your servers.
- What happens when someone tries to reverse engineer the app.
- How it handles authentication.
- If and how the business logic can be manipulated.
We won’t just provide you with a list of theoretical vulnerabilities. Our goal is to show you what an attacker could do and help you prioritise the issues.
Compared to automated tools, there is a vast difference. These tools flag thousands of potential issues, many of which are false alarms. Others are technical issues, but not a real risk.
A 7ASecurity manual penetration test validates findings, prioritise the severity of the risks, and provides solution guidance.
Static Analysis vs Dynamic Analysis
Mobile security testing splits into two main approaches. You need to understand both before you hire a testing provider.
1. Static Application Security Testing (SAST)
Static analysis examines your app without running it. Testers decompile the app package to:
- Inspect the source code or bytecode.
- Review configuration files.
- Analyse how it’s built.
This approach is great for finding nuances that developers left in the code by mistake. This includes things like API keys, database passwords, or internal URLs that shouldn't be public. It also finds insecure encryption and poor coding practices.
The limitation here is context. Static analysis sees what the code could do, not what the code does in practice. For example, a function that looks dangerous might never run during normal use. Or something that looks secure could reveal sensitive data while it runs.
2. Dynamic Application Security Testing (DAST)
Dynamic analysis examines the app while it's running. Testers use the app and monitors its behaviour. We intercept the network traffic, manipulate input data, and explore unexpected actions.
This approach reveals problems with how you handle user sessions. It shows us:
- If we can bypass login screens.
- Any management flaws it might have.
- If there are ways to access your servers.
- If your app is sending sensitive data without encryption.
- How the app actually behaves in the real world.
The limitation here is coverage. Dynamic testing only looks at the parts of the app we actually use. If a feature is hidden behind a premium subscription or a weird menu, we can miss it unless we specifically look for it.
Why You Need Both
Effective mobile penetration testing combines both approaches.
- Static analysis gives us the map, showing us what is in the app and how it's built.
- Dynamic analysis gives us the proof. It shows us which weaknesses are real and what damage they can cause.
Relying on just one approach leaves big gaps. We've seen apps pass strict static analysis but then leak passwords over unencrypted connections. Others pass dynamic testing because the attacker never found the weak code that static analysis would have spotted immediately.
Common Tools and What They Actually Do
Mobile security testing involves specialised tools. But, as any handyman will tell you, the important thing is how you use the tools. Here’s a quick look at what we use.
- Frida: This is a toolkit that lets us put our code into your running app, also known as hooking. It helps us bypass security controls and manipulate the app’s behaviour. We use it to see how the app processes data in the phone's memory.
- Burp Suite: This tool intercepts and manipulates the data moving between the mobile app and your server. It shows exactly what the app is sending. It helps us check if encryption is working and if we can bypass server-side validation by changing requests.
- Objection: Working with Frida, it gives us an easier way to do general testing. We use it to bypass SSL pinning, dump keychain credentials, or explore the app’s files.
- Jadx and Apktool: These tools take Android apps and turn them back into readable code, helping us with our static analysis.
- Hopper and Ghidra: Similarly, these tools work for iOS apps. They take the compiled app and break it down so we can see the logic inside.
These tools are amplifiers, not substitutes for skill. A skilled tester with basic tools will find critical flaws that an unskilled tester with expensive tools will miss entirely.
The Human Element: Why Tools Alone Miss Critical Flaws
Here's something the security industry doesn't talk about enough. The most dangerous vulnerabilities in mobile apps are often invisible to automated tools.
Business Logic Flaws
These weaknesses don't follow patterns that scanners recognise.
Imagine an e-commerce app. The scanner sees that the payment page uses encryption. It marks it as "safe." But a human tester tries to apply a discount code after the payment is processed. If the app allows this and refunds the difference, that's a flaw. A scanner will never find that.
Think about a banking app. It might calculate interest on the phone instead of the server. A user could change that number before sending it to the bank. A scanner won't know that's wrong. It requires a human to understand what the app is supposed to do, and then ask what happens if it doesn't.
Authentication Bypass
To identify these problems, you must often manipulate workflow.
Can you:
- Finish a password reset without getting the email?
- Look at another user's data by changing a number in the web address?
- Gain admin rights by changing the order of steps?
These attacks require human intuition. We have to think like a criminal to find flaws.
Insecure Data Storage Vulnerabilities
It might look obvious in static analysis, but context is key.
A fitness app storing your step count on the phone is fine. That same app storing your medical records in the same way is a disaster. To know the difference, you have to understand the purpose of the app.
This is why we don't just do mobile security testing. We teach it. Our advanced security training exists because all security professionals should understand the attacker's mindset. The best security teams are the ones who understand how these flaws work, not just how to patch them when exposed.
Real Attack Scenarios: What Testers Actually Look For
Abstract vulnerability can be hard to picture. You know data breaches happen, but only in the movies and to big corporations, right? Here are some scenarios we’ve encountered.
1. Reverse Engineering and Tampering
Attackers can decompile your app to understand its logic. Once they do, they can extract valuable info or create a fake version of your app.
For example, a game might verify in-app purchases on the phone. An attacker can change the code to say "payment accepted" without spending a cent. A financial app might have fraud detection logic built in. If an attacker can read that logic, they can figure out exactly how to bypass it.
We test:
- To see if your code obfuscation works.
- If the app can detect when it’s been tampered with.
- If critical logic can be executed on your secure servers instead of being sent to the user.
2. Insecure Data Storage
Mobile apps store more data on user devices than developers realise. We often find authentication tokens, personal data, and encryption keys.
This data is accessible to malware and anyone who steals the device.
We check:
- Backup files and app databases.
- The device keychain or keystore.
- Exactly what an attacker could access and extract from the device.
3. Network Communication Weaknesses
Despite years of warnings, insecure network communication is still a very common issue. We often see apps that fail to check SSL certificates properly or transmit sensitive data over open channels.
During our mobile pentesting, we:
- Intercept network traffic to see what's going on.
- Bypass certificate pinning.
- Explore whether hackers on the same Wi-Fi network can access and manipulate data.
4. Authentication and Session Management
- How does your app verify user identity?
- How long do users remain logged in?
- What happens when someone tries to reuse old login tokens?
We test and review the whole login process, looking for weaknesses in how you establish identity. This is to make sure that when a user logs out, they are actually logged out everywhere.
iOS vs Android: The Testing Differences
Android Is Accessible to Testers
This makes it easier for testers to decompile code. Although it means we can access the file system without much trouble, so can hackers. Unfortunately, the techniques that work in testing labs tend to also work on real phones in the real world.
Android also has a fragmentation problem. Your app might behave differently on a Samsung phone compared to a Pixel phone. A security hole might be fixed on one version of Android, but still open on millions of older devices.
iOS Is More Restricted
Apple controls the ecosystem tightly. This creates barriers for testers and attackers, and decompilation is harder. Accessing the file system usually requires "jailbreaking" the device.
These restrictions do provide some security benefits. But they also create false confidence. When business owners hear that we need a jailbroken phone to test their iOS app, they assume they’re safe. They assume this means real-world attackers face the same barriers.
That assumption is incorrect.
Motivated attackers have access to jailbroken devices. They have private exploits. They have techniques that bypass Apple's protections. We have to test under those same conditions to find the real risks.
Both platforms deserve equal attention. The technical approach differs, but the security principles remain consistent.
Challenging the "Secure by Default" Assumption
Many development teams operate under a dangerous assumption. They think modern development frameworks are secure by default. They think that if they follow the guidelines from Apple and Google, the app will be safe.
This is understandable but incorrect. Frameworks provide security features, but they don't ensure you use them correctly.
They can't:
- Prevent logic flaws.
- Stop a developer from storing sensitive data in insecure locations because it was convenient at the time.
- Guarantee that your server validates input properly.
The app stores provide baseline protection against obvious malware. However, they don't perform the detailed security analysis that catches app-specific vulnerabilities. Apple and Google review millions of apps. They can't dedicate the hours required to thoroughly test each one.
Regulations like GDPR require you to implement appropriate technical measures to protect personal data. Compliance isn't optional, and "we followed the platform guidelines" isn't a sufficient defence when a breach exposes user information.
The question isn't whether your framework provides security features. It's whether your specific implementation uses them correctly for your specific use case. Only manual penetration testing can answer that.
Frequently Asked Questions About Mobile Pentesting
How long does mobile penetration testing typically take?
It depends on how complex your app is. A simple consumer app might take five to ten days. A complex financial app with many different user roles could take several weeks. We don't guess. We scope every project based on a realistic assessment of what thorough testing requires.
What factors influence the cost?
The main drivers are the complexity of the app and the scope of the test. An app that just displays data costs less to test than one that handles money. Testing both iOS and Android versions increases the work. Including backend API testing adds depth but also takes more time. We provide a detailed scope so you know exactly what you're paying for.
Do testers need to jailbreak or root devices?
Often, yes. Jailbreaking (for iOS) or rooting (for Android) gives us the access we need. We need to see how the app stores data, inspect memory, and bypass client-side protections. Some testing is possible on stock devices, but comprehensive testing typically requires greater privileges.
Attackers use these same techniques, which is why we must use them too if we want to find the real risks.
How often should we test our mobile apps?
You should test before any major release. For live apps, you should test at least once a year. If you make big changes to how you handle logins or payments, you should test again.
It's much cheaper to pay for a test than to pay for a data breach.
We Educate as Well as We Test
We approach mobile penetration testing differently because understanding is just as important as finding bugs.
When we deliver a report, we want your team to understand not just what we found, but why it matters. We want them to know how to prevent these issues in the future. That's why we offer both professional penetration testing services and security training.
The organisations with the strongest security aren't the ones that just outsource testing. They are the ones who combine outside help with internal knowledge.
Your mobile app deserves more than checkbox security.
