Discover insights from leading mobile app security experts | Promon

Mobile app pentest readiness guide: Regular and resilience testing

Written by Simon Lardinois | Oct 22, 2025 1:43:17 PM

Mobile app penetration testing is a key checkpoint in every secure development lifecycle. It’s how teams validate that their apps are designed securely, handle data correctly, and protect users’ trust. 

But not all penetration tests or ‘pentests’ are designed for the same purpose. There are two distinct types of mobile pentests, each with a different goal, scope, and outcome: 

  • Regular pentests—These are designed to uncover security vulnerabilities in app logic, storage, and communication. 
  • Resilience pentests—These are designed to test whether your app can withstand attacks when actively tampered with, reverse-engineered, or executed in hostile environments. 

Understanding the difference between them is critical both for how your team prepares and for how Promon fits into your overall mobile security strategy.

Read more: How to understand your mobile app penetration test report

Regular pentests: Uncovering security vulnerabilities

Regular penetration tests follow frameworks like OWASP ASVS or MASVS (Mobile Application Security Verification Standard). They are focused on finding security vulnerabilities that attackers could exploit to gain access, steal data, or bypass controls. They function as an audit in which testers evaluate how the app is designed and built, not how it defends itself. 

What testers look for in a regular pentest 

  • Weak authentication and session management 

  • Unencrypted or improperly stored sensitive data 

  • API misconfigurations and insecure communications 

  • Missing or broken access controls 

  • Unsafe input validation 

How developers prepare for a regular pentest 

  • Use secure design and authentication standards (OCRA, OAuth 2.0). 
  • Encrypt sensitive data both at rest and in transit (TLS, certificate pinning) 
  • Validate all user input and handle errors safely. 
  • Review code for hardcoded credentials or API keys. 
  • Keep dependencies and SDKs patched and verified. 

Where Promon helps with regular pentest preparation 

Promon doesn’t perform or replace a regular pentest. Instead, Promon’s products complement it by helping your app stay secure after you’ve passed one. 

During a regular pentest, testers usually require a build without runtime protections enabled, so they can freely inspect code, analyze flows, and uncover real vulnerabilities. After vulnerabilities are fixed, Promon’s application shielding, runtime protection, and attestation strengthen the app against future exploitation by making it harder for attackers to discover or weaponize flaws that were not discovered during the pentest. 

 

Resilience pentests: Testing runtime protection and tamper resistance 

Resilience pentests are far less common than regular pentests, and are highly specialized. They focus on verifying the defensive capabilities of an app under active attack based on OWASP MASVS-R. In this test, the goal isn’t to find vulnerabilities in your code logic, but to confirm your app’s ability to detect, resist, and respond to runtime manipulation, reverse engineering, and tampering attempts. 

What testers look for in a resilience test 

  • Can the app detect rooting, jailbreaking, and hooking frameworks (Frida, Magisk)? 
  • Are reverse engineering tools blocked or disrupted? 
  • Does the app prevent repackaging or modification? 
  • Are sensitive assets, keys, and logic protected from extraction? 
  • Do attestation and integrity checks correctly identify trusted environments? 

How developers prepare for a resilience test 

  • Ensure that code obfuscation and application shielding are enabled in production builds. 
  • Validate runtime protections: run the app on compromised devices and verify that it blocks or alerts. 
  • Implement integrity and attestation checks to verify the app’s authenticity. 

Where Promon helps with resilience pentests 

Resilience pentests are where Promon products help more directly. Promon SHIELD™ and related products provide runtime application self-protection (RASP) capabilities to immediately address MASVS-R requirements. They embed obfuscation, anti-tampering, anti-hooking, and environment integrity checks inside the app. This creates a self-defending layer that protects even when network or device security fails. In a resilience pentest, these are exactly the protections being tested and validated. 

A resilience pentest asks: Can your app defend itself in a compromised environment? Promon’s products exist to make the answer yes.

Learn more: What is the OWASP MASVS?

 

How regular and resilience pentests work together 

Most organizations conduct regular pentests multiple times a year for compliance, certification, or product assurance. Resilience pentests are rarer. They are often one-off engagements led by critical sectors such as finance, banking, and healthcare. But frequency isn't the only difference. Resilience pentests test an entirely different dimension of security maturity.

  Regular pentest Resilience pentest
Goal Find security vulnerabilities Validate runtime defense strength
Framework OWASP ASVS / MASVS-L1/2 OWASP MASVS-R
Test focus App design, data handling, API security Anti-tampering, runtime protection, attestation
Conductor AppSec teams of external pentesters Specialized mobile security testers
Promon's role Strengthen client-side security post-pentest Directly tested and validated for resilience

 

Promon enables both pentest types but in different ways. 

  • For regular pentests, Promon helps you harden your app post-fix. 
  • For resilience pentests, Promon provides the runtime defense layer being assessed. This proves your app can withstand sophisticated attacks.

 

Preparing your app for both pentest types 

For a regular pentest, you need to provide testers with a build that has Promon disabled, so they can find genuine vulnerabilities. Make sure your team documents security controls (encryption, authentication, input validation). The best mindset is to treat every finding as a chance to strengthen the app before release. 

For a resilience pentest, you should provide a production build with Promon enabled, since this test validates runtime defenses. Run internal simulations first to confirm protections trigger i.e. hooking, rooting, and repackaging. Monitor your app during the test to capture logs, alerts, and environment integrity data. 

Together, these two testing types give you full-spectrum assurance: 

  • Regular pentests find and fix vulnerabilities
  • Resilience pentests prove your defenses hold up under attack

Why both pentest types matter for your mobile security maturity 

Security today is layered. Passing one type of pentest doesn’t mean your app is safe in the wild. 

  • A regular pentest validates design and logic. It answers the question: “Did we build our app securely?” 
  • A resilience pentest validates durability. It answers the question: “Will our app stay secure when attacked?” 

Promon bridges these worlds. By embedding runtime protections directly inside the app, attackers are hindered from finding further vulnerabilities, even in the face of tampering, reverse engineering, or hostile tools. This is what deep, inside-out app security achieves. 

From compliance to confidence 

Every mobile app team must prepare for penetration testing. But the most mature teams go beyond passing tests by building apps that can endure. Application shielding uses techniques like code obfuscation to make is more difficult for attacks to access or reverse engineer the underlying code. And you can prove strength in resilience pentests by delivering proven runtime protection and attestation. 

Download the Regular Pentest Readiness Checklist and the Resilience Pentest Readiness Checklist. These are practical tools for developers preparing for both types of testing.