What to do if attackers have already exploited your site's vulnerability

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You should identify potential problems and check your sites for vulnerabilities regularly, at least once a month, and ideally more often, because if you get hacked, you will suffer serious damage.

And finally, we would like to give some general recommendations on protecting a web resource. Perhaps, they will seem elementary to experienced specialists, but will be useful to novice webmasters.

Download the new version of CMS quickly.

Use plugins to protect your site (Wordfence or Sucuri are good options for WordPress) and always update their versions.

Set a complex password and change medical practice email list it regularly.

Be sure to change your password if you have shared it with a third party (programmer, SEO optimizer, etc.).

Do not download themes and plugins from untrusted sources.

Connect your site to Yandex.Webmaster to promptly receive the necessary information if problems occur.

Make backups regularly, including to your local computer.

Install an antivirus on your computer and constantly check it for viruses.

Download a useful document on the topic:

Checklist: How to Achieve Your Goals in Negotiations with Clients
If your resource is under attack, recovery (backup) will not be enough. What to do? In such a situation, you need to:

immediately identify which files have been changed (replaced), such as index.php, template, image, etc.;

take screenshots of the consequences;

report the incident to your hosting provider (and agree on all actions with them);

log site files in a separate directory along with access, time and modification;

restore (backup) using a backup copy of the site or with the help of the host;

download error logs (access) to the site or ask the hoster for them (then copy them to a separate directory);

analyze the time of site modifications and compare them with the time indicated in the logs (this will help to establish the nature of the vulnerability and the hacker's IP address);

update scripts and, if this is not possible, stop using all vulnerable modules;

change access passwords (ALL!).