Question: Is there a threat hunting tool that gives immediate access to a large threat intelligence data ocean for rapid incident response?

If you want a serious threat hunting tool that gives you direct access to a vast threat intelligence data lake for quick incident response, Team Cymru has a suite of tools. Its Pure Signal Scout tool is geared for quick threat hunting and incident response and integrates with your existing security infrastructure. The suite also includes tools like Pure Signal Recon for threat reconnaissance and Pure Signal Orbit for digital business risk management.

Another good option is Recorded Future, a service that offers real-time intelligence across cyber, supply-chain, physical and fraud domains. Its Intelligence Graph ingests and processes data from many sources, including the dark web and open web, to provide insights. It also offers ransomware mitigation and automated security workflows, so it can help you improve defenses and anticipate threats.

You could also look at Flashpoint, which offers timely and accurate threat intelligence to help reduce risk and improve protection. The service combines human-processed data collection and expert analysis to help teams across a range of industries, including CTI/SOC, Fraud Teams and Corporate Security. Flashpoint offers advanced analytics, dashboards and alerting tools to help you spot and respond to emerging threats.

If you want something that fits well with Microsoft's security products, Microsoft Defender Threat Intelligence offers real-time information on cyber attackers and their infrastructure. It offers continuous threat intelligence, adversary profiling and accelerated incident response that can help you improve your security posture and incident response.