Warning – Unrecognised WordPress Files(s) Detected

Hello
I started getting a lot of alerts from Shield:
Warning – Unrecognised WordPress Files(s) Detected

when I check the files in the alert, it looks like legit files.
are these files malicious?
what can be done?

http://criminalsbook.com/public_html/wp-admin/css/press-this.css
http://criminalsbook.com/public_html/wp-admin/css/press-this-rtl.css
http://criminalsbook.com/public_html/wp-admin/css/press-this-rtl.min.css
http://criminalsbook.com/public_html/wp-admin/css/press-this-editor.min.css
http://criminalsbook.com/public_html/wp-admin/css/press-this-editor-rtl.css
http://criminalsbook.com/public_html/wp-admin/css/press-this-editor-rtl.min.css
http://criminalsbook.com/public_html/wp-admin/css/press-this-editor.css
http://criminalsbook.com/public_html/wp-admin/css/press-this.min.css
http://criminalsbook.com/public_html/wp-admin/includes/class-wp-press-this.php
http://criminalsbook.com/public_html/wp-admin/js/press-this.min.js
http://criminalsbook.com/public_html/wp-admin/js/press-this.js
http://criminalsbook.com/public_html/wp-admin/js/bookmarklet.js
http://criminalsbook.com/public_html/wp-admin/js/bookmarklet.min.js
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/flashmediaelement.swf
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/controls.png
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/controls.svg
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/loading.gif
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/bigplay.svg
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/skipback.png
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/jumpforward.png
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/silverlightmediaelement.xap
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/bigplay.png
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/froogaloop.min.js
http://criminalsbook.com/public_html/wp-includes/js/mediaelement/background.png
http://criminalsbook.com/public_html/wp-includes/js/plupload/plupload.flash.swf
http://criminalsbook.com/public_html/wp-includes/js/plupload/plupload.silverlight.xap
http://criminalsbook.com/public_html/wp-includes/js/plupload/plupload.full.min.js
http://criminalsbook.com/public_html/wp-includes/js/swfupload/swfupload.swf
http://criminalsbook.com/public_html/wp-includes/js/swfupload/plugins/swfupload.queue.js
http://criminalsbook.com/public_html/wp-includes/js/swfupload/plugins/swfupload.swfobject.js
http://criminalsbook.com/public_html/wp-includes/js/swfupload/plugins/swfupload.speed.js
http://criminalsbook.com/public_html/wp-includes/js/swfupload/plugins/swfupload.cookies.js