What method is NOT used by URL filtering to prevent C2 attacks?

The method that is not typically used by URL filtering to prevent command-and-control (C2) attacks is based on Virus Total Matches.

URL filtering primarily focuses on analyzing the URLs that users attempt to access to determine their safety and appropriateness. It involves matching URLs against known databases of harmful sites and applying various filters to block known malicious domains before users can access them. This proactive approach is crucial in defending against C2 attacks, which often rely on communication with malicious servers.

While Virus Total is a valuable tool for security researchers, it mainly aggregates information about URLs, files, and domains to assess their reputation and detect malware presence. However, it is not a real-time filtering method used directly in the URL filtering process. In contrast, methods such as URL Matches, Botnet and C2 Matches, and Filetype Matches are directly applied in the context of URL filtering, aiming to identify and mitigate risks associated with harmful web traffic.

Thus, Virus Total Matches do not play an integral role in the immediate prevention of C2 attacks through URL filtering mechanisms.