/frida-ios-intercept-api

A tool to help you intercept encrypted APIs in iOS apps

Primary LanguageJavaScriptMIT LicenseMIT

Frida iOS intercept api

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CodeQL python frida

📍What does it help?

Banking applications, e-wallets, .. are increasingly enhanced security to fight hackers. One of them is to encrypt request/response data when sending and receiving. Some weak encryptions can be decrypted easily, but some strong encryptions like RSA are difficult. When pentesting a normal mobile application, we just need to set it up so that BurpSuite can intercept the request / response of the APIs that the application uses. But when pentesting a banking or e-wallet application with end-to-end encrypted API, with the usual BurpSuite setup we cannot see the content of the API. Hooking into functions that send request/response and intercept data before it is encrypted is one way we can view and modify data.

Architecture

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Configurage handlers.js

  1. Add your Request / Response Class & Method
/*Request Class & Method*/
var search_request_class  = [''];
var search_request_method = [''];

/*Response Class & Method*/
var search_response_class  = [''];
var search_response_method = [''];`
  1. Debug ARGS in method
/*DEBUG REQUEST HERE*/
console.log(colors.green,"[DEBUG-REQUEST] Dump Arugment in method: ",colors.resetColor);
print_arguments(args);
console.log(ObjC.Object(args[3]));
var message1 = ObjC.Object(args[2]);
var message2 = ObjC.Object(args[3]);
var message3 = ObjC.Object(args[4]);

console.log('msg1=' + message1.toString() + ",type: "+ message1.$className);
console.log('msg2=' + message2.toString() + ",type: "+ message2.$className);
console.log('msg3=' + message3.toString() + ",type: "+ message3.$className);

Usage

  1. Load burpsuite_configuration_proxy.json or Set up Burpsuite Proxy by following the steps below
    • Listen on 127.0.0.1:26080
    • Redirect to 127.0.0.1:27080 and Check (Support invisible proxying)
  2. Run echoServer.py
  3. Config and optimize handlers.js
  4. Run burpTracer.py -p com.apple.AppStore / [-n 'App Store']

Note: Different applications will use different libraries. You need to reverse or trace the application to find the correct function.

Medium

Frida iOS Intercept Api

Working with

Application Demo Request Class & Method Response Class & MEthod
OceanBank https://youtu.be/hn1GV-JCpjc
SaiGonBank Smart Banking https://youtu.be/7C0SLvtI7RY
BaoViet Smart https://youtu.be/1JWRDhR79qk