Advisory: Office 365 Password Spraying

What is it? Password spraying is a type of brute-force attack in which a malicious actor uses a single password against targeted user accounts before moving on to attempt a second password, and so on. This technique allows the actor to remain undetected by avoiding rapid or frequent account lockouts. See: https://attack.mitre.org/techniques/T1110/ Why are we posting this? Yesterday we identified …

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