Microsoft says a threat actor gained access to cloud tenants hosting Microsoft Exchange servers in credential stuffing attacks, with the end goal of deploying malicious OAuth applications and sending ...

Microsoft has warned that fraudulent Microsoft Partner Network (MPN) accounts were used in a phishing campaign that featured bogus apps that tricked victims into granting them permissions to access ...

Microsoft Corp. researchers today detailed a recent attack involving malicious OAuth applications that were deployed on compromised cloud tenants to control Exchange servers and spread spam. The ...