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Hackers Use FastHTTP in New High-speed Microsoft 365 Password Attacks

Hackers are using the FastHTTP Go library to execute high-speed brute-force password attacks on Microsoft 365 accounts globally, with a 10% success rate. The campaign began on January 6, 2025, targeting Azure Active Directory. Most attacks originate from Brazil, and they involve overwhelming multi-factor authentication (MFA) attempts. Microsoft warns that these takeovers can lead to data breaches. Administrators can use a provided PowerShell script to identify affected accounts and are advised to take immediate security measures if malicious activity is detected.

https://www.bleepingcomputer.com/news/security/hackers-use-fasthttp-in-new-high-speed-microsoft-365-password-attacks/

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