?

It’s .bashrc, not bashrc, and .bashrc is in the home directory.
If .bashrc is immutable, it can’t be removed from home.

If the .bashrc is immutable, the attacker can’t remove it.
That’s how it works.

No, that’s not how it works.
You really should stop talking shit about things you know nothing about.
Truly sad.

So, you learned about .bashrc today, and you’re now an expert?
Perhaps stand down and let the experts have their say.