Wordfence has published an article for web site owners who have experienced a hack and how to recover from the loss of SEO ranking.
If your site has been hacked and you have successfully cleaned your site and closed the security hole the attacker used to gain access, you’ll need to recover any damage done to your SEO ranking and reputation.
Here is the link to article:
Wordfence posts an article that walks you through how an attack platform works and the scripts and capabilities that it provides.
“During a recent investigation of a very large infection we found a trove of attack tools that all pointed back to a single ‘meta’ script. This script was only two lines long but provided an attacker with a powerful capability. Once it fully installs itself it provides what we are referring to as an ‘attack platform’.”