Veil v2.0 : Towards a True Framework

Repo Location: https://github.com/Veil-Framework/Veil-Evasion

Team Veil is proud to announce the release of Veil v2.0.  This drastically reworked version of the Veil AV-evasion framework incorporates a new structure, a slew of new features, and a variety of new payloads:

New Structure

  • Veil has moved from a single flat file towards a truly modular framework:
    • Payload modules dropped into ./modules/payloads/[language] are loaded into the framework automatically
    • Common reusable functions are stored in various files in ./modules/common/*
    • Source/compiled files are output by default to ./output/source/ and ./output/compiled/
    • ./config/update.py is executed automatically on first run, producing a common configuration file at ./config/veil.py, which can be edited manually
    • External tools used by payloads are stored in ./tools/
    • ./doc/* contains pydoc generated documentation for the framework
  • A tutorial describing how to develop payload modules is forthcoming.

New features

  • Veil’s menus and interface have been redesigned for increased usability.
  • One of the common requests for Veil was the inclusion of additional msfvenom shellcode payloads. To incorporate this, we built in automatic crawling of the metasploit /windows/* payload tree and the extraction of necessary payload parameters. The payloads should tab complete within the shellcode selection menu, in msfvenom windows/PAYLOAD format.
  • Tab completion has also been added in a variety of places around the framework, including most menus, LHOST for IP completion, and LPORT for 4444 completion. Try it out!
  • A new python ‘crypter’ named ‘pyherion’ (inspired by Null Security’s Hyperion) has been introduced, which encapsulates python payload files in an AES/base64 encoded wrapper that dynamically decodes/decrypts the python code in memory and executes it. A standalone version has also been introduced in ./tools/pyherion.py . A short post explaining its implementation details will be forthcoming.
  • Command line switches have been implemented for almost all options. Type ./Veil.py -h for details.

New payloads

  • C payloads – Using both a void pointer reference and direct injection into memory with VirrtualAlloc calls
  • Powershell – VirtualAlloc injection, MSF-psexec formatted resource file generation, and download/execution of a secondary payload.
  • C# payloads – VirtualAlloc and base64 obfuscated payloads have been introduced, along with C# .exe compilation.
  • Native payloads – hyperion and pescrambler

 

Welcome to Veil’s Home!

Welcome to veil-framework.com, the home of Veil, a framework designed to generate payloads that bypass antivirus!

We are currently in the process of finalizing Veil’s framework.  Why?  We want to make it as easy as possible for the community to contribute new techniques to Veil.  We’d like to make it as simple as creating a new technique, and dropping it into a directory.  Veil will detect a new payload method, and incorporate it to allow you to generate payloads with the newly added payload method.

We are also currently developing documentation on both how to use Veil, and write payloads for it.  Documentation for developing payloads will require us to finalize Veil’s framework, however, we are near its completion.

If you have any questions, or suggestions, feel free to comment on this blog, hit us up on twitter, shoot us an e-mail, or submit a pull request on our github repo!

In the meantime, enjoy the site and Veil!