Primer paso de la investigacion. Se aportan el .apk, las carpetas con el apk extraido y el apk descompilado. El archivo API_DOCUMENTATION.md es un archivo donde se anotaran los descubrimientos del funcionamiento de la API, y los .py son scripts para probar la funcionalidad de la API con los métodos que vayamos encontrando. Finalmente, los archivos .js son scripts de Frida para extraer informacion de la APP durante la ejecucion.

apk_decompiled/sources/retrofit2/a.java

@@ -0,0 +1,38 @@
+package retrofit2;
+
+import retrofit2.DefaultCallAdapterFactory;
+
+/* loaded from: classes3.dex */
+public final /* synthetic */ class a implements Runnable {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final /* synthetic */ int f8323a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final /* synthetic */ DefaultCallAdapterFactory.ExecutorCallbackCall.AnonymousClass1 f8324b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public final /* synthetic */ Callback f8325c;
+
+    /* renamed from: d, reason: collision with root package name */
+    public final /* synthetic */ Object f8326d;
+
+    public /* synthetic */ a(DefaultCallAdapterFactory.ExecutorCallbackCall.AnonymousClass1 anonymousClass1, Callback callback, Object obj, int i) {
+        this.f8323a = i;
+        this.f8324b = anonymousClass1;
+        this.f8325c = callback;
+        this.f8326d = obj;
+    }
+
+    @Override // java.lang.Runnable
+    public final void run() {
+        switch (this.f8323a) {
+            case 0:
+                DefaultCallAdapterFactory.ExecutorCallbackCall.AnonymousClass1.b(this.f8324b, this.f8325c, (Response) this.f8326d);
+                return;
+            default:
+                DefaultCallAdapterFactory.ExecutorCallbackCall.AnonymousClass1.a(this.f8324b, this.f8325c, (Throwable) this.f8326d);
+                return;
+        }
+    }
+}