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Hooking applications

Techniques used to alter the behaviour of applications.

Frida

In short, it is a dynamic instrumentation framework, which enables function hooking and allows to provide a definition to it during runtime. Basically, it injects JavaScript code into a process. Suppose, there is a function called “foo” in a program with a specific body/implementation. Using “Frida”, one can change the body/implementation of the “foo” function during runtime. “Frida” supports a variety of platforms like Windows, macOS, GNU/Linux, iOS, Android, and QNX. More information on “Frida” can be found here.

For install

pip install frida-tools

Now check version and download the server

frida --version

Unzip file and push the server in the local system /data/local/tmp

adb push /path/serverfrida /data/local/tmp

Permissions

adb shell chmod 777 /data/local/tmp/frida-server

Run frida server

adb shell /data/local/tmp/frida-servername&

now execute in your command line frida-ps -U

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