Tycoon2FA Launches Nearly 1 Million Attacks Targeting Office 365 Accounts

Tycoon2FA, a sophisticated phishing-as-a-service platform tracked by Microsoft as Storm-1747, has emerged as the dominant threat targeting Office 365 accounts throughout 2025. The cybercriminal operation has launched an aggressive campaign involving nearly one million attacks, establishing itself as the most prolific phishing platform observed by security researchers this year. In October 2025 alone, Microsoft Defender […]

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