Hello – This post is meant to be informative to the developers concerning a failed revert.
After running a scan, malware was found in all the theme functions.php files.
I clicked on ‘clean’. The automatic site test stayed red, indicated the clean did not work. I clicked on ‘revert’, but the site remained broken.
The malware was on line 1 of the functions.php file. The error after cleaning was:
Parse error: syntax error, unexpected ‘)’ in /home/content/p/r/o/prongpower/html/wp-content/themes/twentyfifteen/functions.php on line 1
Malware was still in the file, with a leading ‘)’ causing the error.
I resolved by restoring a clean file from backup.
malware infected file available by request if it helps your troubleshooting.