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/kotlin/concurrent/ThreadsKt.java

@@ -0,0 +1,76 @@
+package kotlin.concurrent;
+
+import com.google.android.gms.measurement.api.AppMeasurementSdk;
+import kotlin.Metadata;
+import kotlin.Unit;
+import kotlin.internal.InlineOnly;
+import kotlin.jvm.JvmName;
+import kotlin.jvm.functions.Function0;
+import kotlin.jvm.internal.Intrinsics;
+import kotlin.jvm.internal.SourceDebugExtension;
+
+@Metadata(d1 = {"\u0000:\n\u0000\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\u000b\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\u000e\n\u0000\n\u0002\u0010\b\n\u0000\n\u0002\u0018\u0002\n\u0002\u0010\u0002\n\u0002\b\u0002\n\u0002\u0010\u0000\n\u0002\u0018\u0002\n\u0002\b\u0003\u001aJ\u0010\u0000\u001a\u00020\u00012\b\b\u0002\u0010\u0002\u001a\u00020\u00032\b\b\u0002\u0010\u0004\u001a\u00020\u00032\n\b\u0002\u0010\u0005\u001a\u0004\u0018\u00010\u00062\n\b\u0002\u0010\u0007\u001a\u0004\u0018\u00010\b2\b\b\u0002\u0010\t\u001a\u00020\n2\f\u0010\u000b\u001a\b\u0012\u0004\u0012\u00020\r0\f\u001a3\u0010\u000e\u001a\u0002H\u000f\"\b\b\u0000\u0010\u000f*\u00020\u0010*\b\u0012\u0004\u0012\u0002H\u000f0\u00112\f\u0010\u0012\u001a\b\u0012\u0004\u0012\u0002H\u000f0\fH\u0087\bø\u0001\u0000¢\u0006\u0002\u0010\u0013\u0082\u0002\u0007\n\u0005\b\u009920\u0001¨\u0006\u0014"}, d2 = {"thread", "Ljava/lang/Thread;", "start", "", "isDaemon", "contextClassLoader", "Ljava/lang/ClassLoader;", AppMeasurementSdk.ConditionalUserProperty.NAME, "", "priority", "", "block", "Lkotlin/Function0;", "", "getOrSet", "T", "", "Ljava/lang/ThreadLocal;", "default", "(Ljava/lang/ThreadLocal;Lkotlin/jvm/functions/Function0;)Ljava/lang/Object;", "kotlin-stdlib"}, k = 2, mv = {1, 9, 0}, xi = 48)
+@JvmName(name = "ThreadsKt")
+@SourceDebugExtension({"SMAP\nThread.kt\nKotlin\n*S Kotlin\n*F\n+ 1 Thread.kt\nkotlin/concurrent/ThreadsKt\n+ 2 fake.kt\nkotlin/jvm/internal/FakeKt\n*L\n1#1,61:1\n1#2:62\n*E\n"})
+/* loaded from: classes3.dex */
+public final class ThreadsKt {
+    @InlineOnly
+    private static final <T> T getOrSet(ThreadLocal<T> threadLocal, Function0<? extends T> function0) {
+        Intrinsics.checkNotNullParameter(threadLocal, "<this>");
+        Intrinsics.checkNotNullParameter(function0, "default");
+        T t2 = threadLocal.get();
+        if (t2 != null) {
+            return t2;
+        }
+        T invoke = function0.invoke();
+        threadLocal.set(invoke);
+        return invoke;
+    }
+
+    public static final Thread thread(boolean z3, boolean z4, ClassLoader classLoader, String str, int i, final Function0<Unit> block) {
+        Intrinsics.checkNotNullParameter(block, "block");
+        Thread thread = new Thread() { // from class: kotlin.concurrent.ThreadsKt$thread$thread$1
+            @Override // java.lang.Thread, java.lang.Runnable
+            public void run() {
+                block.invoke();
+            }
+        };
+        if (z4) {
+            thread.setDaemon(true);
+        }
+        if (i > 0) {
+            thread.setPriority(i);
+        }
+        if (str != null) {
+            thread.setName(str);
+        }
+        if (classLoader != null) {
+            thread.setContextClassLoader(classLoader);
+        }
+        if (z3) {
+            thread.start();
+        }
+        return thread;
+    }
+
+    public static /* synthetic */ Thread thread$default(boolean z3, boolean z4, ClassLoader classLoader, String str, int i, Function0 function0, int i4, Object obj) {
+        if ((i4 & 1) != 0) {
+            z3 = true;
+        }
+        if ((i4 & 2) != 0) {
+            z4 = false;
+        }
+        if ((i4 & 4) != 0) {
+            classLoader = null;
+        }
+        if ((i4 & 8) != 0) {
+            str = null;
+        }
+        if ((i4 & 16) != 0) {
+            i = -1;
+        }
+        int i5 = i;
+        String str2 = str;
+        return thread(z3, z4, classLoader, str2, i5, function0);
+    }
+}