This is the main logon page for Capital One 360 (formerly ING Direct):
https://secure.capitalone360.com/myaccount/banking/login.vmIt has worked fine for years, but today Avast blocked it citing URL:Mal or URL:Mal2, which I understand to be a blacklisted URL. I checked VirusTotal and ZULU URL Risk Analyzer and only ZULU had anything to say. Specifically "suspicious FQDN string" and "Netblock size risk". I'm pretty good, but not good enough to determine the actual risk posed by those two anomalies.
Malwarebytes and Avast's own scan show my PC to be clean. Since this is supposedly a blacklisted URL I wouldn't necessarily expect to find anything on my machine anyway.
Is there a way to determine how/why secure.capitalone360.com has been blacklisted?
Using Firefox 51.0.1 by the way.