@kapilkapoor I am having this issue with a new site. Most likely this is the problem.
How did you knew you had malware on your wp-config file?
Did you contact your service provider (i.e. Hostgator) by phone or mail?
The link does not work anymore.
https://ww.wp.xz.cn/support/topic/read-this-first-–-wordpress-43-master-list
This webpage has a redirect loop
ERR_TOO_MANY_REDIRECTS
I got the same problem with the HERO theme, I solved it with this.
