frida-rootbypass-and-sslunpinning-lg-thinq

Frida Script to bypass root detection and SSL Unpinning for mitm proxy listening for the LG ThinQ Android App

I needed to inspect some of the commands sent over the LG ThinQ API, but any of the common SSL unpinning scripts triggered the LG app's root detection.

Used with Windows Subsystem for Android (WSA) On Windows 11 - Rooted w/ Magisk & Google Play Store/Services

• (See here for more info to setup)

This script successfully bypasses the root detection and allows for the SSL unpinning to occur, so the mitmproxy (or similar) can be used to view information sent to the API.

Example Usage (With WSA)

• Prerequisites
  • Rooted Windows Subsystem for Android w/ Google Play/Services
  • Installed on WSA From Playstore:
    • Google Chrome
    • LG ThinQ
  • Frida
  • mitmproxy
  • Magisk Modules - Not sure if all are necessary, but in the process of gettings this worked out I installed the following modules:
    • ADB Root
      • Allows adb root
    • MagiskFrida
      • Automatically runs frida-server on boot with Magisk
    • MITMProxy cert
      • Requires mitmproxy to be set up and connected to access link
      • Automatically adds the mitmproxy certificat to the trusted system certificates
    • Systemless Hosts
      • Installed within Magisk app
    • Universal SafetyNet Fix
      • SafetyNet and Play Integrity modules
• Install prerequisites and run mitmweb to view output in web-browser

Steps

• Connect with ADB

   adb connect 127.0.0.1:58526

  ADB Output (Expandable)

  C:\Users\USERNAME>adb connect 127.0.0.1:58526
  connected to 127.0.0.1:58526

• Modify Proxy Settings

  adb shell am start -a android.intent.action.MAIN -n com.android.settings/.Settings

  ADB Output (Expandable)

  C:\Users\USERNAME>adb shell am start -a android.intent.action.MAIN -n com.android.settings/.Settings
  Starting: Intent { act=android.intent.action.MAIN cmp=com.android.settings/.Settings }

  • Go to network settings, and modify VirtWifi network and set Proxy to your Ethernet adapter vEthernet (WSLCore) interface IP (you can find this in powershell with ipconfig command) and port 8080 (or other port set)
    • You'll likely have to use tab/shift+tab to navigate the popup window. Rarely could I click it properly.
    • Your adapter may have a different name than Ethernet adapter vEthernet (WSLCore)

• Restart WSA (Turn Off in WSA Settings)

• Connect with ADB again (if needed)

• Open Google Chrome (WSA App, not your normal browser) and navigate to http://mitm.it/cert/magisk and download/setup the module in Magisk.

  • You should also setup/enable Zygisk and Hide Magisk App now, if you haven't before
  • Zygisk and Enforce DenyList should be enabled, and the LG app should be selected within Configure DenyList
  • Select the option to hide the Magisk app, and rename it to something not containing Magisk (I chose 'My Settings')

• Restart WSA (Turn Off in WSA Settings)

• Launch Magisk App

• Launch app with Frida script

  frida -l frida-rootbypass-and-sslunpinning-lg-thinq.js -U -f com.lgeha.nuts

  Frida Output (Expandable)

  C:\Users\USERNAME\Downloads>frida -l frida-rootbypass-and-sslunpinning-lg-thinq.js -U -f com.lgeha.nuts
       ____
      / _  |   Frida 16.1.3 - A world-class dynamic instrumentation toolkit
     | (_| |
      > _  |   Commands:
     /_/ |_|       help      -> Displays the help system
     . . . .       object?   -> Display information about 'object'
     . . . .       exit/quit -> Exit
     . . . .
     . . . .   More info at https://frida.re/docs/home/
     . . . .
     . . . .   Connected to Pixel 5 (id=127.0.0.1:58526)
  Spawned `com.lgeha.nuts`. Resuming main thread!
  [Pixel 5::com.lgeha.nuts ]-> [+] SSLPeerUnverifiedException auto-patcher
  [+] HttpsURLConnection (setDefaultHostnameVerifier)
  [+] HttpsURLConnection (setSSLSocketFactory)
  [+] HttpsURLConnection (setHostnameVerifier)
  [+] SSLContext
  [+] TrustManagerImpl
  [+] OkHTTPv3 (list)
  [ ] OkHTTPv3 (cert)
  [+] OkHTTPv3 (cert array)
  [ ] OkHTTPv3 ($okhttp)
  [ ] Trustkit OkHostnameVerifier(SSLSession)
  [ ] Trustkit OkHostnameVerifier(cert)
  [ ] Trustkit PinningTrustManager
  [ ] Appcelerator PinningTrustManager
  [ ] OpenSSLSocketImpl Conscrypt
  [ ] OpenSSLEngineSocketImpl Conscrypt
  [ ] OpenSSLSocketImpl Apache Harmony
  [ ] PhoneGap sslCertificateChecker
  [ ] IBM MobileFirst pinTrustedCertificatePublicKey (string)
  [ ] IBM MobileFirst pinTrustedCertificatePublicKey (string array)
  [ ] IBM WorkLight HostNameVerifierWithCertificatePinning (SSLSocket)
  [ ] IBM WorkLight HostNameVerifierWithCertificatePinning (cert)
  [ ] IBM WorkLight HostNameVerifierWithCertificatePinning (string string)
  [ ] IBM WorkLight HostNameVerifierWithCertificatePinning (SSLSession)
  [ ] Conscrypt CertPinManager
  [ ] CWAC-Netsecurity CertPinManager
  [ ] Worklight Androidgap WLCertificatePinningPlugin
  [ ] Netty FingerprintTrustManagerFactory
  [ ] Squareup CertificatePinner (cert)
  [ ] Squareup CertificatePinner (list)
  [ ] Squareup OkHostnameVerifier (cert)
  [ ] Squareup OkHostnameVerifier (SSLSession)
  [+] Android WebViewClient (SslErrorHandler)
  [ ] Android WebViewClient (WebResourceError)
  [ ] Apache Cordova WebViewClient
  [ ] Boye AbstractVerifier
  [ ] Appmattus (CertificateTransparencyInterceptor)
  [ ] Appmattus (CertificateTransparencyTrustManager)
  Unpinning setup completed
  ---
  Security check bypassed, reporting NOT_ROOTED.
    --> Bypassing TrustManagerImpl checkTrusted
    --> Bypassing TrustManagerImpl checkTrusted
    --> Bypassing OkHTTPv3 (list): route.lgthinq.com
    --> Bypassing Trustmanager (Android < 7) request
    --> Bypassing TrustManagerImpl checkTrusted
    --> Bypassing TrustManagerImpl checkTrusted
    --> Bypassing OkHTTPv3 (list): aic-service.lgthinq.com
    --> Bypassing TrustManagerImpl checkTrusted
    --> Bypassing HttpsURLConnection (setDefaultHostnameVerifier)
    --> Bypassing OkHTTPv3 (list): noti.lgthinq.com
    --> Bypassing TrustManagerImpl checkTrusted
    --> Bypassing OkHTTPv3 (list): common.lgthinq.com
    --> Bypassing TrustManagerImpl checkTrusted
    --> Bypassing OkHTTPv3 (list): aic-common.lgthinq.com

SSL Unpinning formed from https://github.com/httptoolkit/frida-android-unpinning/

Maintanence and Update

I probably won't be using this until I happen to get another LG device/appliance, so while this code works at the time of publishing it very well may not in the future as I won't be able to provide continuous support to it.

Feel free to fork and/or submit a Pull Request for modifications needed due to future changes to the LG API, LG ThinQ app, or Android/WSA in general.