wordpress copied full page .asp problem

Hello,

i found afew websites over google wich have a full copy of my sourcecode on it. It looks all the same way like: htt://www.domain.tld/aboutus2.asp

on the aboutus2.asp file is a full copy of my code.

Now i get a seo problem with duplicated content. Someone knows about this or found the same problem?

I think that other websites got hacked maybe?

thank you for help!