title: Backdoor:PHP/webshell Malware
body: <p>I have this website which i want to replace because its outdated, we made a new website. But as always before uploading the new website to the live environment i make a backup of the current live website. While i was downloading the Wordpress installation my windows defender popped up with the following message. Malware found: </p>
  
  <blockquote>
    <p>Backdoor:PHP/webshell</p>
  </blockquote>
  
  <p>What exactly is this? Is it dangerous for my computer or is it a backdoor for the website. How did this happen. Anything would be really helpful on this matter. Should i run a scan on my whole computer? </p>
  
  <p>Thanks in advance.</p>