About Jeroen Beckers
Jeroen Beckers is a mobile security expert working in the NVISO Software Security Assessment team. He travels around the world teaching SANS SEC575: iOS and Android Application Security Analysis and Penetration Testing and is a one of the authors of the OWASP Mobile Application Security (MAS) project, which includes:
- OWASP Mobile Application Security Testing Guide (MASTG)
- OWASP Mobile Application Security Verification Standard (MASVS)
- OWASP Mobile Application Security Weakness Enumeration (MASWE)
Latest Articles
Using a custom root CA with Burp for inspecting Android N traffic
Android
TL;DR: Follow these steps to intercept traffic using Burp with a self made root CA on Android (or any browser)…
Intercepting HTTPS Traffic from Apps on Android 7+ using Magisk & Burp
Android
Intercepting HTTPS traffic is a necessity with any mobile security assessment. By adding a custom CA to Android, this can…
A closer look at the security of React Native biometric libraries
Android
Many applications require the user to authenticate inside the application before they can access any content. Depending on the sensitivity…
How to analyze mobile malware: a Cabassous/FluBot Case study
Android
This blogpost explains all the steps I took while analyzing the Cabassous/FluBot malware. I wrote this while analyzing the sample…
Intercepting traffic from Android Flutter applications
Android
Update: The explanation below explains the step for ARMv7. For ARMv8 (64bit), see this blogpost. ⚠️ Update August 2022 ⚠️An update…
Intercepting Flutter traffic on Android (ARMv8)
Mobile Security
In a previous blogpost, I explained my steps for reversing the flutter.so binary to identify the correct offset/pattern to bypass…
Intercepting Flutter traffic on iOS
Frida
My previous blogposts explained how to intercept Flutter traffic on Android ARMv8, with a detailed follow along guide for ARMv7.…
Proxying Android app traffic – Common issues / checklist (June 2025)
Uncategorized
Latest update: June 2025 During a mobile assessment, there will typically be two sub-assessments: The mobile frontend, and the backend…
New mobile malware family now also targets Belgian financial apps
Mobile Security
While banking trojans have been around for a very long time now, we have never seen a mobile malware family…
Intercept Flutter traffic on iOS and Android (HTTP/HTTPS/Dio Pinning)
Android
Some time ago I wrote some articles on how to Man-In-The-Middle Flutter on iOS, Android (ARM) and Android (ARM64). Those…
