How to Detect Deep Proxy in Android Apps

Last updated November 19, 2023 by Appdome

Learn to Detect Deep Proxy in Android apps, in mobile CI/CD with a Data-Driven DevSecOps™ build system.

What is Deep Proxy?

Whereas the Malicious Proxy Detection protection is based on detecting and blocking connections from untrusted sources, deep Proxy detection detects any attempt to modify the app’s initial proxy settings. If such attempts are not thwarted, they can cause the app proxy to behave in a way that seems safe, but might be vulnerable to attacks; for example, intercept a call to a safe address to enforce redirection to a malicious website. Such attacks enable accessing the app and changing its behavior in malicious ways.

Deep Proxy Detection is critical to protect the Shared Secret passed between the client backend and the AP Mobile App. The Shared Secret connection must be protected from all forms of MiTM, including proxies, to avoid someone (or something) listening in and deducing the secret in transit.

By enabling (toggling On) Deep Proxy Detection, Appdome detects attempts of Deep Proxy attacks.

Why Prevent Deep Proxy Attacks?

Two prominent examples of behavior that is scrutinized by Deep Proxy are header manipulation and redirects.

Nowadays, multiple websites and applications are accessible at the same IP address. The way to differentiate between the various websites and applications is to use a header, which contains further information with regard to the address with which one wants to communicate. Modifying the header can override the information and request from the address, thereby potentially stealing the information or causing unwanted behavior of the application.

A redirect modifies the addresses of outward URLs which the application calls. The modification is done for malicious purposes, either to redirect the application call to a dubious destination such as a phishing website or to enable illegal access to otherwise inaccessible parts of the application. In so doing, redirects can be used for malicious purposes such as malware injection, code injection, stealing credentials or tracking user traffic.

Prerequisites for Using Deep Proxy Detection:

To use Appdome’s mobile app security build system to Detect Deep Proxy , you’ll need:

Detect Deep Proxy on Android apps using Appdome

On Appdome, follow these 3 simple steps to create self-defending Android Apps that Detect Deep Proxy without an SDK or gateway:

  1. Upload the Mobile App to Appdome.

    1. Upload an app to Appdome’s Mobile App Security Build System

    2. Upload Method: Appdome Console or DEV-API
    3. Android Formats: .apk or .aab
    4. Deep Proxy Detection Compatible With: Java, JS, C++, C#, Kotlin, Flutter, React Native, Unity, Xamarin, Cordova and other Android apps
  2. Build the feature: Deep Proxy Detection.

    1. Building Deep Proxy Detection by using Appdome’s DEV-API:

      1. Create and name the Fusion Set (security template) that will contain the Deep Proxy Detection feature as shown below:
      2. fusion set that contains Deep Proxy Detection

        Figure 1: Fusion Set that will contain the Deep Proxy Detection feature
        Note: Naming the Fusion Set to correspond to the protection(s) selected is for illustration purposes only (not required).

      3. Follow the steps in Sections 2.2.1-2.2.2 of this article, Building the Deep Proxy Detection feature via Appdome Console, to add the Deep Proxy Detection feature to this Fusion Set.

      4. Open the Fusion Set Detail Summary by clicking the “...” symbol on the far-right corner of the Fusion Set, as shown in Figure 1 above, and get the Fusion Set ID from the Fusion Set Detail Summary (as shown below): fusion Set Detail Summary image

        Figure 2: Fusion Set Detail Summary
        Note: Annotating the Fusion Set to identify the protection(s) selected is optional only (not mandatory).

      5. Follow the instructions below to use the Fusion Set ID inside any standard mobile DevOps or CI/CD toolkit like Bitrise, App Center, Jenkins, Travis, Team City, Cirlce CI or other system:
        1. Build an API for the app – for instructions, see the tasks under Appdome API Reference Guide
        2. Look for sample APIs in Appdome’s GitHub Repository
    2. Building the Deep Proxy Detection feature via Appdome Console

      To build the Deep Proxy Detection protection by using Appdome Console, follow the instructions below.

      1. Where: Inside the Appdome Console, go to Build > Security Tab > Secure Communication section.
      2. When you select the Deep Proxy Detection you'll notice that your Fusion Set you created in step 2.1.1 now bears the icon of the protection category that contains Deep Proxy Detection

        Fusion Set applied Deep Proxy Detection

        Figure 4: Fusion Set that displays the newly added Deep Proxy Detection protection

      3. Click Build My App at the bottom of the Build Workflow (shown in Figure 3).
    Congratulations!  The Deep Proxy Detection protection is now added to the mobile app
  3. Certify the Deep Proxy Detection feature in Android Apps.

    After building Deep Proxy Detection, Appdome generates a Certified Secure™ certificate to guarantee that the Deep Proxy Detection protection has been added and is protecting the app. To verify that the Deep Proxy Detection protection has been added to the mobile app, locate the protection in the Certified Secure™ certificate as shown below: Deep Proxy Detection shown in Certificate secure

    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 Deep Proxy Detection has been added to each Android app. Certified Secure provides instant and in-line DevSecOps compliance certification that Deep Proxy Detection and other mobile app security features are in each build of the mobile app

Using Appdome, there are no development or coding prerequisites to build secured Android Apps by using Deep Proxy Detection. 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 Deep Proxy Detection

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:

Related Articles:

If you have any questions, please send them our way at 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.

Want a Demo?

MiTM Attack Prevention

TomWe're here to help
We'll get back to you in 24 hours to schedule your demo.