Identity & Access Alert: Microsoft MFA Bypassed via AuthQuake Attack!

🔓 A shocking bypass Microsoft Multi-Factor Authentication (MFA) in under an hour with zero user interaction required! This technique, dubbed AuthQuake, was reported to Microsoft in June 2024, leading to a temporary fix. A permanent fix was rolled out in October 2024. 🛠️

The vulnerability allowed attackers with a victim’s username and password to bypass MFA and access:

📧 Outlook Emails📂 OneDrive Files💬 Teams Chats☁️ Azure Cloud InstancesMultiple Simultaneous Attempts: Attackers exploit the way MFA codes are generated. Each code lasts for 3 minutes and allows up to 10 failed attempts.Parallel Brute Force: Attackers send multiple attempts simultaneously, increasing their chances of guessing the code.No Victim Notification: The user isn’t alerted, making it a silent attack. 🤫50% Success in 70 Minutes: Tests show that after 24 sessions (70 mins), the chance of guessing the correct MFA code exceeds 50%.⏱️ Quick Exploitation: Attack takes less than an hour.🕵️♂️ Stealthy: Victims aren’t notified of the attack.🚪 Wide Access: It can expose emails, cloud files, chats, and more.🔥 Massive Impact: Microsoft has over 400 million Office 365 users globally, making this a critical issue.Temporary Fix (June 2024): Applied an initial patch to slow down attacks.Permanent Fix (October 2024): Added a stricter rate limit for MFA attempts. If too many attempts fail, the system enforces a 12-hour cooldown period to prevent further attempts.📥 Update MFA Settings: Ensure you’re using the latest MFA configuration from Microsoft.🔐 Enable Stronger Authentication: Use hardware keys (like YubiKeys) instead of app-based MFA.📛 Monitor Suspicious Login Attempts: Be alert for unusual login attempts on your Microsoft account.🛡️ Penetration Testing: Identify gaps in your identity access management. Wire Tor Pentest Services can help secure your organization.

The AuthQuake attack exposes a critical flaw in Microsoft MFA. Organizations must act fast to ensure security updates are applied. For in-depth identity and access penetration testing, check out Wire Tor Pentest Services to keep your systems airtight. 🔐

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