ENG, or Encore Next Generation, is a false-negative morphic tool that can bypass IDS/IPS via the randomization of return addresses, random writable addresses, junk code injection, and more.
You can download it from the following link: https://packetstormsecurity.com/files/download/70145/eng-4.23-public.rar
Source: https://packetstormsecurity.com/files/70145/eng-4.23-public.rar.html

