> For the complete documentation index, see [llms.txt](https://docs.talsec.app/appsec-articles/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.talsec.app/appsec-articles/glossary/hook-detection/how-does-an-app-detect-hooking.md). # How does an app “detect” hooking? **There are a few approaches:** **• The app can check its own integrity and environment at runtime.** If something doesn’t look as expected (for example, a critical function’s code has been altered in memory, or an unexpected library is loaded into the app’s process), the app might suspect a hook. **• It can also look for known footprints of hooking frameworks.** Many hooking tools leave telltale signs (specific file names, process names, or injected code patterns) that can be recognized. For instance, if a well-known hooking tool is attached, the app might notice unusual debug connections or the presence of classes and methods that only exist when a framework like Xposed or Frida is in use. **• Hook detection often goes hand-in-hand with root detection or jailbreak detection.** Since hooking typically requires elevated privileges, an app that finds a device is rooted/jailbroken will treat it as a higher-risk environment and may assume a hooking attack is possible. Some apps refuse to run in such cases or operate in a limited mode. In essence, hook detection is any check or safeguard that allows an app to sense “I’m being watched or controlled by someone else’s code right now.” Once detected, the app can then respond (for example, by shutting down, disabling sensitive features, or alerting the user). --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.talsec.app/appsec-articles/glossary/hook-detection/how-does-an-app-detect-hooking.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.