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Encrypted exploit delivery for the masses
JavaScript HTML Ruby
Branch: master
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Latest commit 32a92ce Sep 25, 2019


This project aims at delivering browser exploits to the victim browser in an encrypted fashion. Ellyptic-curve Diffie-Hellman (secp256k1) is used for key agreement and AES is used for encryption.

By delivering the exploit code (and shellcode) to the victim in an encrypted way, the attack can not be replayed. Meanwhile the HTML/JS source is encrypted thus reverse engineering the exploit is significantly harder.

If you have no idea what I am talking about, Google for "How to hide your browser 0-days", and check my presentation. Or check out it on Youtube: Or slides on Slideshare:

The idea of encrypted exploit delivery was first published by me in June 2, 2015:

The Angler exploit kit guys just stole my idea. And implemented it poorly.

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes.


Mandatory dependencies - clone the IRONSQUIRREL project, cd into the project directory, and run the following commands:

sudo apt-get install ruby-dev
bundle install

Actually nokogiri and gibberish gems will be installed.

Optional dependency (for Powershell based environment aware encrypted payload delivery): Ebowla


  1. Clone the IRONSQUIRREL project
  2. Install the prerequisites
  3. (Optional) Edit IRONSQUIRREL.rb
    1. Change the listen port
    2. If Ebowla is used, configure the paths
  4. (Optional) If Ebowla is used, configure genetic.config.ecdh in the Ebowla install directory
ruby IRONSQUIRREL.rb --exploit full_path_to_exploit


ruby IRONSQUIRREL.rb --exploit /home/myawesomeusername/IRONSQUIRREL/exploits/alert.html

After that, visit the webserver from a browser. Example output:

Listening on 2345
GET / HTTP/1.1
GET /sjcl.js HTTP/1.1
GET /dh.js HTTP/1.1
GET /client_pub.html?cl=SOifQJetphU2CvFzZl239nKPYWRGEH23ermGMszo9oqOgqIsH5XxXi1vw4P4YFWDqK6v4o4jIpAVSNZD1x5NTw%3D%3D HTTP/1.1
GET /final.html HTTP/1.1
GET /sjcl.js HTTP/1.1
The end

Deployment instructions for production environments

  1. Let me know if you use this for real
  2. Spend at least 2 weeks to figure out what could go wrong


Feel free to submit bugfixes, feature requests, comments ...


  • Zoltan Balazs (@zh4ck) - Initial work


This project is licensed under the GPL3 License - see the file for details


  • @CrySySLab
  • @SpamAndHex
  • @molnar_g
  • @midnite_runr
  • @buherator
  • @sghctoma
  • @zmadarassy
  • @xoreipeip
  • @DavidSzili
  • @theevilbit
  • Szimeus


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