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/com/google/firebase/sessions/ProcessDetailsProvider.java

@@ -0,0 +1,105 @@
+package com.google.firebase.sessions;
+
+import android.app.ActivityManager;
+import android.app.Application;
+import android.content.Context;
+import android.os.Build;
+import android.os.Process;
+import com.google.android.gms.common.util.ProcessUtils;
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.List;
+import kotlin.Metadata;
+import kotlin.collections.CollectionsKt;
+import kotlin.collections.CollectionsKt__IterablesKt;
+import kotlin.jvm.internal.Intrinsics;
+
+@Metadata(d1 = {"\u00004\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\u000e\n\u0000\n\u0002\u0010\b\n\u0002\b\u0002\n\u0002\u0010\u000b\n\u0000\n\u0002\u0010 \n\u0000\n\u0002\u0018\u0002\n\u0002\b\u0004\bÀ\u0002\u0018\u00002\u00020\u0001B\u0007\b\u0002¢\u0006\u0002\u0010\u0002J.\u0010\u0003\u001a\u00020\u00042\u0006\u0010\u0005\u001a\u00020\u00062\b\b\u0002\u0010\u0007\u001a\u00020\b2\b\b\u0002\u0010\t\u001a\u00020\b2\b\b\u0002\u0010\n\u001a\u00020\u000bH\u0002J\u0014\u0010\f\u001a\b\u0012\u0004\u0012\u00020\u00040\r2\u0006\u0010\u000e\u001a\u00020\u000fJ\u000e\u0010\u0010\u001a\u00020\u00042\u0006\u0010\u000e\u001a\u00020\u000fJ\r\u0010\u0011\u001a\u00020\u0006H\u0000¢\u0006\u0002\b\u0012¨\u0006\u0013"}, d2 = {"Lcom/google/firebase/sessions/ProcessDetailsProvider;", "", "()V", "buildProcessDetails", "Lcom/google/firebase/sessions/ProcessDetails;", "processName", "", "pid", "", "importance", "isDefaultProcess", "", "getAppProcessDetails", "", "context", "Landroid/content/Context;", "getCurrentProcessDetails", "getProcessName", "getProcessName$com_google_firebase_firebase_sessions", "com.google.firebase-firebase-sessions"}, k = 1, mv = {1, 7, 1}, xi = 48)
+/* loaded from: classes3.dex */
+public final class ProcessDetailsProvider {
+    public static final ProcessDetailsProvider INSTANCE = new ProcessDetailsProvider();
+
+    private ProcessDetailsProvider() {
+    }
+
+    private final ProcessDetails buildProcessDetails(String processName, int pid, int importance, boolean isDefaultProcess) {
+        return new ProcessDetails(processName, pid, importance, isDefaultProcess);
+    }
+
+    public static /* synthetic */ ProcessDetails buildProcessDetails$default(ProcessDetailsProvider processDetailsProvider, String str, int i, int i4, boolean z3, int i5, Object obj) {
+        if ((i5 & 2) != 0) {
+            i = 0;
+        }
+        if ((i5 & 4) != 0) {
+            i4 = 0;
+        }
+        if ((i5 & 8) != 0) {
+            z3 = false;
+        }
+        return processDetailsProvider.buildProcessDetails(str, i, i4, z3);
+    }
+
+    public final List<ProcessDetails> getAppProcessDetails(Context context) {
+        int collectionSizeOrDefault;
+        Intrinsics.checkNotNullParameter(context, "context");
+        int i = context.getApplicationInfo().uid;
+        String str = context.getApplicationInfo().processName;
+        Object systemService = context.getSystemService("activity");
+        ActivityManager activityManager = systemService instanceof ActivityManager ? (ActivityManager) systemService : null;
+        List<ActivityManager.RunningAppProcessInfo> runningAppProcesses = activityManager != null ? activityManager.getRunningAppProcesses() : null;
+        if (runningAppProcesses == null) {
+            runningAppProcesses = CollectionsKt.emptyList();
+        }
+        List filterNotNull = CollectionsKt.filterNotNull(runningAppProcesses);
+        ArrayList arrayList = new ArrayList();
+        for (Object obj : filterNotNull) {
+            if (((ActivityManager.RunningAppProcessInfo) obj).uid == i) {
+                arrayList.add(obj);
+            }
+        }
+        collectionSizeOrDefault = CollectionsKt__IterablesKt.collectionSizeOrDefault(arrayList, 10);
+        ArrayList arrayList2 = new ArrayList(collectionSizeOrDefault);
+        Iterator it = arrayList.iterator();
+        while (it.hasNext()) {
+            ActivityManager.RunningAppProcessInfo runningAppProcessInfo = (ActivityManager.RunningAppProcessInfo) it.next();
+            String str2 = runningAppProcessInfo.processName;
+            Intrinsics.checkNotNullExpressionValue(str2, "runningAppProcessInfo.processName");
+            arrayList2.add(new ProcessDetails(str2, runningAppProcessInfo.pid, runningAppProcessInfo.importance, Intrinsics.areEqual(runningAppProcessInfo.processName, str)));
+        }
+        return arrayList2;
+    }
+
+    public final ProcessDetails getCurrentProcessDetails(Context context) {
+        Object obj;
+        Intrinsics.checkNotNullParameter(context, "context");
+        int myPid = Process.myPid();
+        Iterator<T> it = getAppProcessDetails(context).iterator();
+        while (true) {
+            if (!it.hasNext()) {
+                obj = null;
+                break;
+            }
+            obj = it.next();
+            if (((ProcessDetails) obj).getPid() == myPid) {
+                break;
+            }
+        }
+        ProcessDetails processDetails = (ProcessDetails) obj;
+        return processDetails == null ? buildProcessDetails$default(this, getProcessName$com_google_firebase_firebase_sessions(), myPid, 0, false, 12, null) : processDetails;
+    }
+
+    public final String getProcessName$com_google_firebase_firebase_sessions() {
+        String myProcessName;
+        if (Build.VERSION.SDK_INT >= 33) {
+            myProcessName = Process.myProcessName();
+            Intrinsics.checkNotNullExpressionValue(myProcessName, "myProcessName()");
+            return myProcessName;
+        }
+        String processName = Application.getProcessName();
+        if (processName != null) {
+            return processName;
+        }
+        String myProcessName2 = ProcessUtils.getMyProcessName();
+        return myProcessName2 != null ? myProcessName2 : "";
+    }
+}