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Initial assessment presentation about the Browser Exploitation Framework

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  1. 1. BeEF The Browser Exploitation Framework FCS Iasi, Software Security
  2. 2. Overview What is BeEF Installation and requirements How it works Case studies & examples Advantages 2 Software Security, FCS Iasi, 2013-2014
  3. 3. What is BeEF? open-source penetration testing tool used to test and exploit web application and browser-based vunerabilities. Main developer: Wade Alcorn, security expert Last stable release: / August 2013 3 Software Security, FCS Iasi, 2013-2014
  4. 4. Installation and requirements OSX 10.5.0 or higher, Modern Linux, Windows XP or higher Ruby 1.9.2 RVM or higher SQLite 3.x A list of ruby gems [...] 4 Software Security, FCS Iasi, 2013-2014
  5. 5. How it works BeEF uses a javascript file hook.js that will hook one or more browsers and will use them for launching directed command modules and further attacks against the system though a open door: the web browser context Uses a web interface to manage and send commands (attacks) to the browser zombies 5 Software Security, FCS Iasi, 2013-2014
  6. 6. BeEF Architecture 6 Software Security, FCS Iasi, 2013-2014 [3]
  7. 7. BeEF Features The official page lists 128 modules (exploits) Modular framework, can be easily extended with custom browser exploitation commands Provides RESTFul API that allows to control BeEF throuth HTTp requests (in JSON format) Can be configured to be integrated with Metasploit 7 Software Security, FCS Iasi, 2013-2014
  8. 8. BeEF Commands Modify the target's page html content (all the content, or alter only the hrefs) redirect the victim's browser to an arbitrary site generate dialog boxes/ fake notifications / request missing plugin installation as a context for placing and executing malicious code browser fingerprinting, detect plugins (ActiveX, Java, Flash, etc.) detect valid sessions of applications such as Twitter, Facebook and GMail. 8 Software Security, FCS Iasi, 2013-2014
  9. 9. Ex 1 - Malicious code injection Fake Notification Bar (e.g. Firefox) Displays a fake notification bar at the top of the screen. If the user clicks the notification they will be prompted to download a malicious Firefox extension (by default). Raw Javascript Sends the code to the selected hooked browsers where it will be executed. Code is run inside an anonymous function and the return value is passed to the framework. Multiline scripts are allowed, no special encoding is required. 9 Software Security, FCS Iasi, 2013-2014
  10. 10. Ex 2 - Web page defacement Replace content (Deface webpage) Overwrite the page, title and shortcut icon on the hooked page. Replace HREFs Rewrite all the href attributes of all matched links. TabNabbing This module redirects to the specified URL after the tab has been inactive for a specified amount of time. 10 Software Security, FCS Iasi, 2013-2014
  11. 11. Ex 3 - Keystroke Logging iFrame Event Logger Creates a 100% by 100% iFrame overlay with event logging. Fake LastPass Displays a fake LastPass user dialog which will log all the user's key strokes. 11 Software Security, FCS Iasi, 2013-2014
  12. 12. Ex 4 – Exporing the network Detect Social Networks This module will detect if the Hooked Browser is currently authenticated to GMail, Facebook and Twitter. (specify detection timeout) Network / Port Scanner Scan ports in a given hostname, using WebSockets, CORS and img tags. It uses the three methods to avoid blocked ports or Same Origin Policy. 12 Software Security, FCS Iasi, 2013-2014
  13. 13. Ex 5 – Browser fingerprinting Spider Eye Creates a snapshot of the victim's window Detect Firebug Detect Silverlight Detect Windows Media Player Detect ActiveX Detect toolbars Etc.. 13 Software Security, FCS Iasi, 2013-2014
  14. 14. Metasploit / w3af / BeEF Metasploit w3af BeEF Language Perl → Ruby Python Ruby Supported OS cross-platform cross-platform cross-platform Pen-testing target network Web applications browser $ Open source + paid Open source Open source Firewall 14 Software Security, FCS Iasi, 2013-2014
  15. 15. Bibliography [1] BeEF project main page: [2] BeEF project Github page: [3] BeEF achitecture diagram: