Attackers sent 52M malicious messages leveraging the likes of Office 365, Azure, OneDrive, SharePoint, G-Suite and Firebase storage in Q1 2021. Threat actors are cashing in on the rapid shift to cloud-based business services during the pandemic. In the first three months of 2021 alone, researchers found 7 million malicious emails sent from Microsoft 365 and a staggering 45 million sent from Google s infrastructure, Proofpoint reported. The authenticity perception is essential, as email recently regained its status as the top vector for ransomware.
Source: https://threatpost.com/microsoft-google-clouds-hijacked-phishing/166329/