In the field of malware analysis and reverse engineering, many job postings call for familiarity with the PE file format, Windows internals, etc. However, Microsoft presumably doesn't want people reversing DLLs and other closed-source binaries.
As someone who may eventually seek an entry level job in this area, I think that my primary way to demonstrate this knowledge is through blog posts, but that seems risky. Would it be better to just disassemble ELF binaries and such, while making vague references in the blog to the analogous Windows constructs?
I know this isn't the place for actual legal advice, but some people here must have experience with how to safely demonstrate their knowledge of proprietary software. I don't think my question is specific enough for legal experts.