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Multi-Factor Auth Bypassed in Office 365 and G Suite IMAP Attacks

Multi-Factor Auth Bypassed in Office 365 and G Suite IMAP Attacks (Malware and Vulnerabilities)

As noted by Proofpoint's Information Protection Research Team in a recent report, during a "recent six-month study of major cloud service tenants, Proofpoint researchers observed massive attacks leveraging legacy protocols and credential dumps to increase the speed and effectiveness of brute force account compromises at scale." 72% of cloud tenants targeted at least once Their analysis unearthed the fact that around 60% of all Microsoft Office 365 and G Suite tenants have been targeted using IMAP-based password-spraying attacks and, as a direct result, approximately 25% of G Suite and Office 365 tenants that were attacked also experienced a successful breach.  On the whole, after crunching down the numbers, Proofpoint reached the conclusion that threat actors managed to reach a surprising 44% success rate when it came to breaching accounts at targeted organizations.

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