This is not an osTicket thing.  Your site has been listed as a phishing / bad site.  You should re-upload the same version of the code to your site that your site uses, and look for other forms of intrusion into your system.  Once you are sure that your site is safe then you would start jumping through the hoops to have the block lifted.  Here are two of the sites there may be more:Report Incorrect Forgery Alerthttps://www.google.com/safebrowsing/report_error/?tpl=mozillaFireFox useshttps://www.stopbadware.org/request-review

Very welcome. :)