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But this decision is solely made by the Microsoft authentication engine customers are unable to configure it themselves, according to Mitiga. If so, the second form of authentication is not required. This technology works by deciding when to require that second form of authentication, such as in cases when someone tries to access resources from a different IP address, requests elevated administrator privileges or attempts to retrieve sensitive data.Īnalyzing the token in an active login session, Microsoft MFA determines if the session had previously been authorized. The problem, according to Mitiga, lies in the weak default settings for Microsoft MFA. Microsoft MFA doesn’t always require a second form of authentication Upon further analysis, Mitiga found that a second Authenticator app had been set up without the victim’s knowledge, providing the attackers with the means to continue to use the breached account. To protect the victim’s account, the organization had implemented Microsoft MFA through the Microsoft Authenticator app, which should have stopped any use of stolen credentials. With an AiTM trick, an adversary creates a proxy server between the victim and the website to be accessed, allowing them to capture the target’s passwords and browser session cookies. The attackers were able to compromise the user’s account and mailbox through an adversary-in-the-middle (AiTM) tactic. In this attack, cyber criminals gained unauthorized access to the Microsoft 365 account of an executive in an organization from multiple locations, including Singapore Dubai and San Jose, California. Though the people in the targeted organization were able to prevent any fraudulent activity, the incident does serve as a warning about the improper setup of MFA. The attackers were able to access sensitive information by exploiting weak default configurations in Microsoft’s multi-factor authentication, according to Mitiga. But to be effective, MFA must be properly and securely configured otherwise, a savvy cyber criminal can find ways to circumvent it.Ī report released Wednesday, August 24, by security advisory firm Mitiga looks at a recent business email compromise campaign against an organization that uses Microsoft 365.
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Even if the password is leaked or stolen, the hackers can’t use it to log into the account without that second form of authentication. Multi-factor authentication (MFA) is often cited as one of the best security methods available to secure sensitive accounts and credentials. How to secure your email via encryption, password management and more (TechRepublic Premium) In security, there is no average behavior
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Image: Getty Images/iStockphoto/Balefire9 Must-read security coverageĨ5% of Android users are concerned about privacyĪlmost 2,000 data breaches reported for the first half of 2022 Mitiga says that MFA, even if improperly configured, is no panacea for preventing attackers from abusing compromised credentials. Note: For best results, do not perform other tasks which would cause processor workload during the conversion.How a business email compromise attack exploited Microsoft’s multi-factor authentication