DuckCorp Dico

Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   black hat
      <security> Someone who uses his skills for criminal or
      malicious ends.  Black hat activities may include, e.g.,
      writing destructive viruses, launching denial of service
      attacks on websites, or stealing credit card numbers or
      banking data by phishing.
      (2019-03-16)