Why is my online store flagged as a virus by antivirus programs?

[Rodr1]

Dear Shopify Comunity,

I hope this message finds you well. I have been reaching out to Shopify Support for some time now regarding a persistent issue without success. Furthermore, I am encountering a situation where, upon loading my page, a URL is consistently generating a 404 error since the last IP verification check.

However, the complication arises as some desktop antivirus programs are flagging it as a virus. Avast, Eset, etc.

The problematic script causing these issues is as follows:
<script type="text/javascript" async="" src="https://demo.rejoincycles.com/carbone/carbonecheckout.j...

Thanks for any help posible.

[Rodr1 · Accepted solution]

I was using a checkout app that injected JS from a blacklisted domain.