The VNC console logo image is controlled by the /console/logo.js file in the theme/locale/web folder. The file contains a JSON-encoded representation of an image file. To change the image, open the file and replace the base64 encoded data (located between ‘base64,’ and ‘“};’)with data resulting from encoding a different .jpg file in base64.
HINT:You can easily find a base64 encoder online that you can use to convert the new branded image you want into base64 code.