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Yep, your site has been reported to the virus police apparently.
Yeehaw! as they say around here.
The iframe included code is likely your virus. Where in your code does the iframe get inserted? In the content -- block or module -- or the theme? Wherever it is, clean it out, and then...
You should update to 2.3.3 -- pretty easy. There was a significant enough security issue before 2.3.2b. Make sure your mainfile is write protected. Use the protector module. Follow general security precautions as otherwise outlined here on the site. Make sure files on your site have the most strict permissions you can have and still work on your web server.