AE64 is a tool which can transform any amd64 architecture shellcode into pure alphanumeric shellcode using self-modify code technology, so the page need to be writable.
For usage example, you can see example folder.
For older version which I written for HCTF2018 christmas pwn challenge, see ver1 folder.
There are already some awesome tools for encoding amd64 alphanumeric shellcode, like https://github.com/SkyLined/alpha3.
AE64's pros and cons:
pros:
- more registers which point to shellcode address can be used.
- the register don't need to point right to shellcode's start address, but can with an offset.
cons:
- shellcode's length after encoded is much longer than alpha3.