This is not a stateful persistent agent but a library included into instrumentation script generated by the Reversense platform.
This library improves the Frida API by offering more concise way to gather data and perform some analysis directly from the app at runtime.
Every hook scripts generated by the platform Reversense include this one.
The official documentation of the library is available here Reversense Documentation
To build the library, you need to install the following dependencies:
git clone https://github.com/ReversenseOrg/dexcalibur-agent.git
cd dexcalibur-agent
npm install
make pack