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Looting iOS App’s Cache.db

Insecure By Default Mobile application assessments diverge somewhat from normal web application assessments as there is an installed client application on a local device to go along with the backend server. Mobile applications can often work offline, and thus have a local store of data. This is commonly in the form of SQLite databases stored...

Scraping Login Credentials With XSS

Unauthenticated JavaScript Fun In prior blog posts I’ve shown the types of weaponized XSS attacks one can perform against authenticated users, using their session to access and exfiltrate data, or perform actions in the application as that user. But what if you only have unauthenticated XSS? Perhaps your client hasn’t provided you with credentials to...

Persisting XSS With IFrame Traps

XSS Iframe Traps Longer Running XSS Payloads An issue with cross-site scripting (XSS) attacks is that our injected JavaScript might not run for an extended period of time. It may be a reflected XSS vulnerability where we’ve tricked our user into clicking a link, but when they land on the page where we were able...

Persistence Through Service Workers-Part 3: Easy JavaScript Payload Deployment

In “Persistence Through Service Workers—PART 2: C2 Setup and Use,” we demonstrated setting up the Shadow Workers C2 server and how to add both the service worker JavaScript and what Shadow Workers calls the “XSS Payload” JavaScript to the target application. In the example, we didn’t load the “XSS Payload” through a cross-site scripting vulnerability....

Persistence Through Service Workers—Part 2: C2 Setup and Use

In Part 1 of this 2-part blog, we provided an overview of service workers and created an appropriate target application to exploit using Shadow Workers. In this blog post we’ll build our C2 server in Digital Ocean and use Shadow Workers to exploit the target application. It is highly recommended to read Part 1 prior...

Persistence Through Service Workers—Part 1: Introduction and Target Application Setup

During a recent discussion about achieving persistence on a web server, someone suggested that I explore using browser service workers. As I began reading about what service workers do, the possibilities for Red Team applications seemed intriguing. But first, I had to find out…what exactly is a service worker? In their efforts to make web...