Let me be more specific, should've asked more to the point in the first place: which archive format have you used for your password protected wallet archive file?
You didn't answer for whatever reasons. Asking again for the last time: what are we searching for, encrypted ZIP files OR encrypted RAR files?
I don't want to assume it's ZIP files because you're talking about zip signatures lastly, when you answered previously
rar, zip
~~~
Seriously?
Find something that actually works under Linux where you usually have better control on which device something operates than this DOS/Windows crap.