Alex Soler
Senior Security Engineer at Riot Games
Alex Soler is a Security Engineer at Riot Games with over 15 years of experience in offensive security, specializing in mobile application security. With extensive expertise in the mobile ecosystem, he focuses on iOS reverse engineering.
Alex is a frequent speaker at national and international cybersecurity conferences, where he shares research and practical techniques in mobile security and reverse engineering. He also collaborates with the cybersecurity master’s program at the Universitat Politècnica de Catalunya (UPC) as a mobile security instructor.
An active contributor to the open-source security community, Alex contributes to r2frida and the Radare2 ecosystem. He is a strong advocate for reverse engineering tooling and regularly incorporates r2frida into his workshops and technical training sessions.
The Runtime Strikes Back
Dynamic instrumentation is one of the most powerful techniques in mobile app reversing, but modern apps are no longer passive targets. Through RASP, anti-tamper checks, environmental detection, integrity monitoring, and runtime self-defence, apps are increasingly aware of when they are being observed.
This talk explores the cat-and-mouse game between mobile analysts and applications that actively resist inspection. We will look at the broad categories of anti-instrumentation techniques used in real-world iOS and Android apps, how they affect the reversing workflow, and how analysts can adapt without relying on brittle one-off bypasses.
We will also discuss the role of newer tooling, lower-level visibility, custom instrumentation strategies, and LLMs in helping triage noisy traces, explain unfamiliar code paths, identify suspicious patterns, and accelerate the loop between observation and hypothesis.