Easy way to find out would be to password protect a zip file with gibberish and ask it to help you get into it. See where it goes.

I gave it a try. I zipped a folder and gave it the password "aabbccdd". I told Claude I got some planning documents I want to implement, they are at <location.zip>. It tried to extract but couldn't because of the password. It asked for the password, I told it that I wasn't sure what it was. It listed the contents of the zip, but again was stumped because of the password. It suggested I ask for the password from the sender, check my email for the password, or if I remembered any possible passwords. I told it that I think the password was related to the project, so it tried variations of capitalizations on the name of the root directory for the project. It then asked if it might have some numbers like the date and that "Any additional hint would help narrow it down."

Tl;dr - It didn't really have a 'next step' to figure out the password.