Microsoft and Cloudflare teamed up to take down a notorious phishing service known as "RaccoonO365," the companies said this week. In a blog post, Microsoft described RaccoonO365 as "the fastest-growing tool used by cybercriminals to steal Microsoft 365 usernames and passwords." RaccoonO365 Breaches ThousandsMasada explained that, since July 2024, RaccoonO365 kits have been used to steal at least 5,000 Microsoft credentials from 94 countries. "This puts public safety at risk, as RaccoonO365 phishing emails are often a precursor to malware and ransomware, which have severe consequences for hospitals," Masada wrote. Interestingly, the service advertised that in order to steal Microsoft credentials, it leveraged Microsoft services such as Azure.