Modern OpenCart provides a very good safety, but there are many other ways for a website infection besides CMS core.
Use this report as an additional defense level to timely detect suspicious activity. It compares previous and current state of the website files. If you did something (e.g. edited a theme, installed an extension, etc), then you just accept your changes. But if you did not do anything, and see strange changes - most likely you caught a virus. Kill it immediately!
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