WP Admin Header Question

Hello!

In an attempt to reduce hacking attempts on a site I renamed the wp-login page on a site. I have been successful in updating all the references to that page except in one area - the logout link. Can someone tell me what file includes the information for the top gray WordPress bar you see in the WP Admin section? Then the far right corner has a drop down menu that includes logout. I have scoured files but can't seem to find the correct one to update this link. Screen shot included so you can see what link I'm referencing.

Thank you for your help!

- Kimberly

instead of messing with the wordpress files, why not use a plugin like WordFence?
If you change the WP code, you have to change the code all over each time you update.