Thankfully, my current place did exactly the opposite. They stated what technologies they used, and had a distinct understanding that you would not know their inhouse app.
They also wanted to see your experience. So the first thing they do before an interview is a audition. You're sat down, on prem, (sys ad job) with Windows 2012 server, IIS, MSSQL, and a toy app. You have to make it work. They record the screencap, and review it as a team to see how you perform the job.
Frankly, I love how this place works and gets things done. Roadblocks are a thing, like all jobs.. But some of these are from those much higher up. But communication and support of your coworkers is absolutely amazing.
But the other thing, I work now in a regulated space. I knew that going in (3 good friends work there as well). Lying on my resume would not be, uhh, good :) There's these nice guys and ladys in suits who specialize in a wee more stringent background checks.
