10,000 organisations targeted by phishing attack that bypasses multi-factor authentication

Graham Cluley writes:

Microsoft has shared details of a widespread phishing campaign that not only attempted to steal the passwords of targeted organisations, but was also capable of circumventing multi-factor authentication (MFA) defences.

The attackers used AiTM (Attacker-in-The-Middle) reverse-proxy sites to pose as Office 365 login pages which requested MFA codes, and then use them to log into the genuine site.

According to Microsoft’s detailed report on the campaign, once hackers had broken into email inboxes via the use of stolen passwords and session cookies, they would exploit their access to launch Business Email Compromise (BEC) attacks on other targets.

Read more at Tripwire.


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