March 23, 2021 Black Kingdom ransomware begins appearing on Exchange servers A novel, if not particularly well made, ransomware is spreading to Exchange servers that haven't been patched against the ProxyLogon exploit Threat Research
March 15, 2021 DearCry ransomware attacks exploit Exchange server vulnerabilities Perhaps not by coincidence, the ransomware's file encryption methodology mimics that of WannaCry. SophosLabs UncutThreat Research
