How to Detect Frida Scripts in Mobile Apps Using AI
Last updated March 18, 2025 by Appdome
This Knowledge Base article describes how to use Appdome’s AI/ML in your CI/CD pipeline to continuously
deliver plugins that Detect Frida Scripts in Mobile apps.
What are Frida Scripts?
Frida scripts are JavaScript- or Python-based scripts used within the Frida dynamic instrumentation framework to analyze, modify, and manipulate mobile apps at runtime. While developers and security researchers use Frida scripts for debugging and penetration testing, attackers exploit them to bypass security controls, inject malicious code, extract sensitive data, and disable app protections. These scripts can hook into API functions, intercept encryption keys, modify authentication logic, and override in-app security measures, making them a serious threat to banking, fintech, healthcare, and enterprise applications. Because Frida scripts execute in real time and can dynamically modify app behavior, they are difficult to detect with traditional static security approaches. Blocking unauthorized Frida script execution is essential to protect against runtime attacks, unauthorized modifications, and data breaches.
How Does Appdome Protect Mobile Apps Against Frida Script Attacks?
Appdome’s Detect Frida Scripts plugin provides real-time protection against unauthorized Frida-based script injections. The plugin monitors app processes for unauthorized script execution, detects injected code, and blocks runtime API hooking attempts. By preventing Frida-driven tampering, it ensures that app security mechanisms remain intact and attackers cannot modify app logic or extract sensitive data. If Frida scripts are detected, Appdome automatically blocks execution, terminates the session, or triggers enforcement actions, securing the app against runtime modifications without requiring developer intervention.
Prerequisites for Using Appdome's Detect Frida Scripts Plugins:
To use Appdome’s mobile app security build system to Detect Frida Scripts , you’ll need:
Upload an app via the Appdome Mobile Defense platform GUI or via Appdome’s DEV-API or CI/CD Plugins.
Mobile App Formats: .ipa for iOS, or .apk or .aab for Android
Detect Frida Scripts is compatible with:
Obj-C, Java, JS, C#, C++, Swift, Kotlin, Flutter, React Native, Unity, Xamarin, and more.
Select the defense: Detect Frida Scripts.
Create and name the Fusion Set (security template) that will contain the Detect Frida Scripts feature as shown below:
Figure 1: Fusion Set that will contain the Detect Frida Scripts feature
Follow the steps in Sections 2.2-2.2.2 of this article to add the Detect Frida Scripts feature to your Fusion Set via the Appdome Console.
When you enable Detect Frida Tool you'll notice that the Fusion Set you created in step 2.1 now bears the icon of the protection category that contains Detect Frida Scripts.
Figure 2: Fusion Set that displays the newly added Detect Frida Scripts protection
Note: Annotating the Fusion Set to identify the protection(s) selected is optional only (not mandatory).
Open the Fusion Set Detail Summary by clicking the “...” symbol on the far-right corner of the Fusion Set. Copy
the Fusion Set ID from the Fusion Set Detail Summary (as shown below):
Figure 3: Fusion Set Detail Summary
Follow the instructions below to use the Fusion Set ID inside any standard mobile DevOps or CI/CD toolkit like Bitrise, Jenkins, Travis, Team City, Circle CI or other system:
Add the Detect Frida Scripts feature to your security template.
Navigate to Build > Anti Fraud tab > Mobile Malware Prevention section in the Appdome Console.
Like all other options in ONEShield™, Detect Frida Scripts is turned on by default, as shown below:
Figure 4: Selecting Detect Frida Scripts
Note: The App Compromise Notification contains an easy to follow default remediation path for the mobile app end user. You can customize this message as required to achieve brand specific support, workflow or other messaging.
Toggle On Detect Frida Tool > Detect Frida Scripts.
Note: The checkmark feature Detect Frida Scripts is enabled by default, as shown below.
Figure 4: Selecting Detect Frida Scripts
Initiate the build command either by clicking Build My App at the bottom of the Build Workflow (shown in Figure 4)
or via your CI/CD as described in Section 2.1.4.
Congratulations! The Detect Frida Scripts protection is now added to the mobile app
Certify the Detect Frida Scripts feature in Mobile Apps
After building Detect Frida Scripts, Appdome generates a Certified Secure™ certificate to guarantee that the Detect Frida Scripts protection has been added and is protecting the app. To verify that the Detect Frida Scripts protection has been added to the mobile app, locate the protection in the Certified Secure™ certificate as shown below:
Figure 5: Certified Secure™ certificate
Each Certified Secure™ certificate provides DevOps and DevSecOps organizations the entire workflow summary, audit trail of each build, and proof of protection that Detect Frida Scripts has been added to each Mobile app. Certified Secure provides instant and in-line DevSecOps compliance certification that Detect Frida Scripts and other mobile app security features are in each build of the mobile app.
Using Threat-Events™ for Frida Scripts Intelligence and Control in Mobile Apps
Appdome Threat-Events™ provides consumable in-app mobile app attack intelligence and defense control when Frida Scripts is detected. To consume and use Threat-Events™ for
Frida Scripts in Mobile Apps, use AddObserverForName in Notification Center, and the code samples for Threat-Events™ for Frida Scripts shown below.
The specifications and options for Threat-Events™ for Frida Scripts are:
Threat-Event™ Elements
Detect Frida Scripts Method Detail
Appdome Feature Name
Detect Frida Scripts
Threat-Event Mode
OFF, IN-APP DEFENSE
Appdome detects, defends and notifies user (standard OS dialog) using customizable messaging.
ON, IN-APP DETECTION
Appdome detects the attack or threat and passes the event in a standard format to the app for processing (app chooses how and when to enforce).
ON, IN-APP DEFENSE
Uses Appdome Enforce mode for any attack or threat and passes the event in a standard format to the app for processing (gather intel on attacks and threats without losing any protection).
Certified Secure™ Threat Event Check
x
Visible in ThreatScope™
x
Developer Parameters for Detecting Frida Scripts Threat-Event™
Threat-Event NAME
Threat-Event DATA
reasonData
Threat-Event CODE
reasonCode
Threat-Event REF
Threat-Event SCORE
currentThreatEventScore
Current Threat-Event score
threatEventsScore
Total Threat-events score
Threat-Event Context Keys
message
Message displayed for the user on event
failSafeEnforce
Timed enforcement against the identified threat
externalID
The external ID of the event which can be listened via Threat Events
osVersion
OS version of the current device
deviceModel
Current device model
deviceManufacturer
The manufacturer of the current device
fusedAppToken
The task ID of the Appdome fusion of the currently running app
kernelInfo
Info about the kernel: system name, node name, release, version and machine.
carrierPlmn
PLMN of the device. Only available for Android devices.
deviceID
Current device ID
reasonCode
Reason code of the occurred event
buildDate
Appdome fusion date of the current application
devicePlatform
OS name of the current device
carrierName
Carrier name of the current device. Only available for Android.
updatedOSVersion
Is the OS version up to date
deviceBrand
Brand of the device
deviceBoard
Board of the device
buildUser
Build user
buildHost
Build host
sdkVersion
Sdk version
timeZone
Time zone
deviceFaceDown
Is the device face down
locationLong
Location longitude conditioned by location permission
locationLat
Location latitude conditioned by location permission
locationState
Location state conditioned by location permission
wifiSsid
Wifi SSID
wifiSsidPermissionStatus
Wifi SSID permission status
threatCode
The last six characters of the threat code specify the OS, allowing the Threat Resolution Center to address the attack on the affected device.
With Threat-Events™ enabled (turned ON), Mobile developers can get detailed attack intelligence and granular defense control in Mobile applications and create amazing user experiences for all mobile end users when Frida Scripts is detected.
The following is a code sample for native Mobile apps, which uses all values in the specification above for Detect Frida Scripts:
Important! Replace all placeholder instances of <Context Key> with the specific name of your threat event context key across all language examples. This is crucial to ensure your code functions correctly with the intended event data.
For example, The <Context Key> could be the message, externalID, OS Version, reason code, etc.
IntentFilter intentFilter = new IntentFilter();
intentFilter.addAction("");
BroadcastReceiver threatEventReceiver = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String message = intent.getStringExtra("message"); // Message shown to the user
String reasonData = intent.getStringExtra("reasonData"); // Threat detection cause
String reasonCode = intent.getStringExtra("reasonCode"); // Event reason code
// Current threat event score
String currentThreatEventScore = intent.getStringExtra("currentThreatEventScore");
// Total threat events score
String threatEventsScore = intent.getStringExtra("threatEventsScore");
// Replace '' with your specific event context key
// String variable = intent.getStringExtra("");
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
}
};
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
registerReceiver(threatEventReceiver, intentFilter, Context.RECEIVER_NOT_EXPORTED);
} else {
registerReceiver(threatEventReceiver, intentFilter);
}
val intentFilter = IntentFilter()
intentFilter.addAction("")
val threatEventReceiver = object : BroadcastReceiver() {
override fun onReceive(context: Context?, intent: Intent?) {
var message = intent?.getStringExtra("message") // Message shown to the user
var reasonData = intent?.getStringExtra("reasonData") // Threat detection cause
var reasonCode = intent?.getStringExtra("reasonCode") // Event reason code
// Current threat event score
var currentThreatEventScore = intent?.getStringExtra("currentThreatEventScore")
// Total threat events score
var threatEventsScore = intent?.getStringExtra("threatEventsScore")
// Replace '' with your specific event context key
// var variable = intent?.getStringExtra("")
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
}
}
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
registerReceiver(threatEventReceiver, intentFilter, Context.RECEIVER_NOT_EXPORTED)
} else {
registerReceiver(threatEventReceiver, intentFilter)
}
let center = NotificationCenter.default
center.addObserver(forName: Notification.Name(""), object: nil, queue: nil) { (note) in
guard let usrInf = note.userInfo else {
return
}
let message = usrInf["message"]; // Message shown to the user
let reasonData = usrInf["reasonData"]; // Threat detection cause
let reasonCode = usrInf["reasonCode"]; // Event reason code
// Current threat event score
let currentThreatEventScore = usrInf["currentThreatEventScore"];
// Total threat events score
let threatEventsScore = usrInf["threatEventsScore"];
// Replace '' with your specific event context key
// let variable = usrInf[""];
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
}
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
24
});
25
}];
const { ADDevEvents } = NativeModules;
const aDDevEvents = new NativeEventEmitter(ADDevEvents);
function registerToDevEvent(action, callback) {
NativeModules.ADDevEvents.registerForDevEvent(action);
aDDevEvents.addListener(action, callback);
}
export function registerToAllEvents() {
registerToDevEvent(
"",
(userinfo) => Alert.alert(JSON.stringify(userinfo))
var message = userinfo["message"] // Message shown to the user
var reasonData = userinfo["reasonData"] // Threat detection cause
var reasonCode = userinfo["reasonCode"] // Event reason code
// Current threat event score
var currentThreatEventScore = userinfo["currentThreatEventScore"]
// Total threat events score
var threatEventsScore = userinfo["threatEventsScore"]
// Replace '' with your specific event context key
// var variable = userinfo[""]
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
);
}
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
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}
27
}
NSNotificationCenter.DefaultCenter.AddObserver(
(NSString)"", // Threat-Event Identifier
delegate (NSNotification notification)
{
// Message shown to the user
var message = notification.UserInfo.ObjectForKey("message");
// Threat detection cause
var reasonData = notification.UserInfo.ObjectForKey("reasonData");
// Event reason code
var reasonCode = notification.UserInfo.ObjectForKey("reasonCode");
// Current threat event score
var currentThreatEventScore = notification.UserInfo.ObjectForKey("currentThreatEventScore");
// Total threat events score
var threatEventsScore = notification.UserInfo.ObjectForKey("threatEventsScore");
// Replace '' with your specific event context key
// var variable = notification.UserInfo.ObjectForKey("");
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
}
);
// Replace '<Context Key>' with your specific event context key
21
// var variable = notification.UserInfo.ObjectForKey("<Context Keys>");
22
23
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
24
}
25
);
window.broadcaster.addEventListener("", function(userInfo) {
var message = userInfo.message // Message shown to the user
var reasonData = userInfo.reasonData // Threat detection cause
var reasonCode = userInfo.reasonCode // Event reason code
// Current threat event score
var currentThreatEventScore = userInfo.currentThreatEventScore
// Total threat events score
var threatEventsScore = userInfo.threatEventsScore
// Replace '' with your specific event context key
// var variable = userInfo.
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
});
// Replace '<Context Key>' with your specific event context key
13
// var variable = userInfo.<Context Keys>
14
15
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
16
});
import 'dart:async';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
class PlatformChannel extends StatefulWidget {
const PlatformChannel({super.key});
@override
State createState() => _PlatformChannelState();
}
class _PlatformChannelState extends State {
// Replace with your EventChannel name
static const String _eventChannelName = "";
static const EventChannel _eventChannel = EventChannel(_eventChannelName);
@override
void initState() {
super.initState();
_eventChannel.receiveBroadcastStream().listen(_onEvent, onError: _onError);
}
void _onEvent(Object? event) {
setState(() {
// Adapt this section based on your specific event data structure
var eventData = event as Map;
// Example: Accessing 'externalID' field from the event
var externalID = eventData['externalID'];
// Customize the rest of the fields based on your event structure
String message = eventData['message']; // Message shown to the user
String reasonData = eventData['reasonData']; // Threat detection cause
String reasonCode = eventData['reasonCode']; // Event reason code
// Current threat event score
String currentThreatEventScore = eventData['currentThreatEventScore'];
// Total threat events score
String threatEventsScore = eventData['threatEventsScore'];
// Replace '' with your specific event context key
// String variable = eventData[''];
});
}
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
}
// Replace '<Context Key>' with your specific event context key
43
// String variable = eventData['<Context Keys>'];
44
});
45
}
46
47
// Your logic goes here (Send data to Splunk/Dynatrace/Show Popup...)
48
}
Using Appdome, there are no development or coding prerequisites to build secured Mobile Apps by using Detect Frida Scripts. There is no SDK and no library to code or implement in the app and no gateway to deploy in your network. All protections are built into each app and the resulting app is self-defending and self-protecting.
Releasing and Publishing Mobile Apps with Detect Frida Scripts
After successfully securing your app by using Appdome, there are several available options to complete your project, depending on your app lifecycle or workflow. These include:
If you have any questions, please send them our way at support.appdome.com or via the chat window on the Appdome platform.
Thank you!
Thanks for visiting Appdome! Our mission is to secure every app on the planet by making mobile app security easy. We hope we’re living up to the mission with your project.
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