Error 404 - Hackers at work Mug

a 404 error page is a web page on a website which primarily shows visitors a warning message and explains that visitors just try to access web pages don’t exist at the moment of access. Malware distributors, hackers, and phishing scammers are continuing to use the practice of hiding login forms for their web shells in fake HTTP error documents. These pages pretend to be HTTP errors such as 404 Not Found or Forbidden, while in reality they are login pages that allow an attacker to access a web shell to issue commands on the server.