Domain overview
This domain covers Android and iOS workflows, APK/IPA analysis, Frida and objection, TLS pinning bypass, mobile storage, intents and deep links, dynamic instrumentation, device trust, anti-tamper behaviour and mobile reverse engineering. Good mobile work keeps the backend in view while still respecting the weird realities of the client: certificates, keychain/keystore choices, package signing, embedded secrets, mobile-specific auth flows and runtime checks.
How to approach this surface
- Treat the client as a trust translator. Mobile apps carry tokens, pinned trust anchors, cached state and hidden assumptions about the backend.
- Static analysis tells you where the logic lives; dynamic instrumentation tells you how it behaves under pressure.
- Transport checks matter, but storage and runtime checks often matter more because they reveal what the app assumes about device integrity.
- Deep links, intents, URL handlers and custom schemes are not convenience features alone; they are control surfaces that often glue the app to the rest of the ecosystem.
- Good mobile pentesting is not just bypassing pinning. It is understanding what the app protects locally, what it trusts remotely and what falls apart when those assumptions shift.
Related certification and framework context
- OWASP MASA practical umbrella for mobile standards, testing and weakness classes.
- OWASP MASVSVerification requirements for mobile assurance thinking.
- OffSec OSED / EXP-301Useful when the mobile client spills into lower-level client exploitation and runtime debugging.
Curated public references
- OWASP MASTGMobile Application Security Testing Guide.
- Frida DocumentationDynamic instrumentation, hooking and runtime inspection.
- GitHub · objectionRuntime exploration for mobile apps on top of Frida.
- GitHub · MobSFStatic and dynamic analysis support for Android and iOS packages.
- Apple Platform SecurityPlatform trust, signing and storage context for iOS.
- Android Developers SecurityAndroid security model, app storage, network and permission context.
Brief index
Android and iOS Testing Flow
A grounded workflow from package acquisition to runtime inspection and backend validation.
Dynamic Instrumentation with Frida
Hooking, tracing and runtime control when static reading is not enough.
TLS Pinning, Storage and Deep Links
Transport trust, local data handling and app-entry abuse.
Mobile Reverse Engineering
When client-side trust decisions need deeper binary and runtime inspection.