Massive Botnet Targets MS 365 Accounts with Password Spraying Attacks

A botnet made up of more than 130,000 compromised devices is conducting large-scale password-spraying attacks against M365 accounts, exploiting non-interactive sign-ins with Basic Authentication.   This method lets malicious actors bypass modern login protections, evade multi-factor authentication (MFA) enforcement, and remain undetected by security teams.  Leveraging Purloined Credentials  Malefactors are leveraging stolen credentials from infostealer logs […]

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