How could you execute the code brought in by the security holes ?
How do you stop a "daemon" on AmigaOS?
Code: Amiga OS 3.1(m68), Amiga OS 4(PPC), MorphOS(PPC), AROS(x86),
not every Amiga uses the same OS mostly even not the same CPU.

Best Luck to try it, there are many many security holes in the old ports, but i do not know a way to use them for anything dangerous.

The Trojan horse would not find the way out of the computer

The last virus on my Amiga was on the bootblock of a floppy disk, no floppy disks no virus.
There where some in old archives on the internet, but nothing that could spread.

1. Trojan horses writen for AmigaOS (PPC or m68 CPU) ?
Never heard from one.
2. Daemon
Amiga is not Unix there are no daemons to be usesd.
3. Thats a Problem, i use telnet, i do not know a SSH Client or Server for Amiga OS
4. Same Problem, PGP Amiga ?
But 3. and 4. could not harm my Amiga -> outbound.

If you use apache samba and so on, different story.
The Amiga ports are normaly rather old, many security holes have been found.
But there are not many users out there, able to assamble a code for the Amiga.

Packages, sounds also like Unix.

Running Nessus aginst an Amiga,
try it please. I do not think that nessus has any idea waht an AmigaOS is.

SSH ? Amiga ?
AmigaOS is not a UNIX or Linux.
no SSH - no problem,
no ftp - no problem,
no smb - no problem,
.
.
.
http as client is the only open Port if you use a standard OS4