Frida js how to save response body to a file

Video Frida js how to save response body to a file Hints on how to use Frida to hook up Android intents at runtime to inject code and override strategies. This information already assumes that you have frida installed and frida server installed to your android system.

Main Android Hooking

• Layer Strategy – WebView URL
• Scenario analysis
• Deal with types
• Class Builder
• Create object
• Objects have been created
• WebView DevTools

Hooking Strings

• chain strategy
• String equals

Layer Strategy – WebView URL

The next code snippet demonstrates how to hook up a Method in a class and set the implementation to the custom code we outline. Read: Frida js how to save the response body to a file We will create a new file called webview.js and put the next code: Then we will name this using this script with frida on our target widget:

• -U for USB mode
• -f to notify frida to start the app
• -l to specify the script to load
• -no-pause to tell frida not to pause the app when it first starts so we don’t have to manually resume it (Optional available)

Scenario analysis

Let’s analyze the above script a little more and clarify what each half is doing: let Webview = java.use (“android.webkit.WebView”);

• Get reference to class android.webkit.WebView

Webview.loadUrl.overload (“java.lang.String”)

• Get a reference to the loadUrl method in the Webview class (android.webkit.WebView).
• Especially the strategy with a String parameter.
• Java strategies will be overloaded (several strategies have similar identities but have completely different parameters), so we want to specify which method specifically.

Webview.loadUrl.overload (“java.lang.String”). Implement = performance (url) {…}

• Set the implementation of the loadUrl method to the performance we outline.
• That is used for all instances of Webview class.

Read more: How to measure your hair length this.loadUrl.overload (“java.lang.String”). Name(this, url);

• Name the unique implementation. Now we have to put java.lang.String specifically in the overloaded method so that we can name the method appropriately.

Deal with types

For String Parameters Strategies it is very simple to find out that we should always set java.lang.String as type, but what about something more complicated? What if the representation accepts a Byte array or a Custom class as a parameter? How do we all know which sort to sort? We can do a Google search or for a faster methodology let the frida errors inform us. If we modify java.lang.String to something invalid like abcd, frida will notify us that the signature doesn’t match any overload and it will tell us what to set to make it legal. Using the previous script as an example: From here we can see there are two overloads:

• overload(‘java.lang.String’)
• overload(‘java.lang.String’, ‘java.util.Map’)

Class Builder

We can hook the constructor of a class using $init as the defining strategy. For example, we will use okhttp3 library and Response class inside.

Call static strategy

OUTPUT

Create object

Read more: How to make imperial jade run on windows 10JOB TO DO: UNFINISHED

Objects have been created

Read more: How to make imperial jade run on windows 10JOB TO DO: UNFINISHEDIf the target extension is using the webview to load the content, you can view the developer tools for the mobile app as you can in some other browsers. However, there is no doubt that the device has webContentsDebugging enabled. Fortunately, we can do it very simply with Frida. We will save the script below in a file called webview-remote-debug.js. We will use the above code on the Amazon Purchases app:We can now use devtools to run JavaScript, test components, view community site visitors, view cookies, view session/origin storage, and more.NOTE: If the device doesn’t develop, try closing Chrome completely and reloading chrome://exam/# gadgets because usually it might crash. MUCH output from the scripts below: Read more: how to fix unaccelerated pixel format in windows 10

chain strategy

String equals

Sources & References

• https://frida.re/docs/examples/android/
• https://github.com/iddoeldor/frida-snippets

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