Add osx aarch64 exec payload

[AlanFoster]

Adds a new osx/aarch64/exec payload that can execute arbitrary user provided commands via a execve system call on M1/M2/M3 Apple laptops.

Verification

1. On an M1 machine
2. Generate a payload:

msf6 payload(osx/aarch64/exec) > generate -f macho cmd=/bin/bash -o shell
[*] Writing 50072 bytes to shell...

3. chmod and execute:

➜  metasploit-framework git:(add-osx-aarch64-exec-payload) ✗ chmod +x ./shell 
➜  metasploit-framework git:(add-osx-aarch64-exec-payload) ✗ ./shell 

The default interactive shell is now zsh.
To update your account to use zsh, please run `chsh -s /bin/zsh`.
For more details, please visit https://support.apple.com/kb/HT208050.
bash-3.2$

With arguments:

msf6 payload(osx/aarch64/exec) > generate -f macho cmd="/bin/bash -c 'echo 123 && echo abc && whoami && echo 🔥'" -o shell
[*] Writing 50072 bytes to shell...

Executing:

$ ./shell
123
abc
user
🔥

[jvoisin]

Suggested change

	end.join("\n")
	push_string += "\n"
	end
	push_string = push_string.join("\n") + "\n"

Invoking a method on the end keyword, even if correct, is a tad confusing when used outside of strings interpolation I think.

[jvoisin]

Suggested change

	it 'genearates the required stack' do
	it 'generates the required stack' do

[jvoisin]

Suggested change

	it 'genearates the required stack' do
	it 'generates the required stack' do

[cgranleese-r7]

Release Notes

Add osx aarch64 exec payload.