Commvault's Threat Scan works great.

We have implemented Threat Scan, and we have had several catches with it. The activity was not malicious, but it did allow us to know that somebody would do something.

Threat Scan's ability to scan backup data for threats is invaluable because it proactively identifies and neutralizes certain viruses and threats that may originate from our G Suite or be reported by our security incident response team, preventing potential outages.