Yes you can, if you got in. Extract the image with YOUR pw in place, upload it. Stating the obvious here, cuz people hurry, don't post the PW you use
So, how do I extract the image over ssh/scp?
I'm not real good with linux, but once you have root password, you should be able to copy the entire thing just like any other files. I was making a general statement. I'm not an expert, But there are people who read this who are.