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UNC6671 BlackFile Vishing Extortion Campaign Targeting Microsoft 365 and Okta

UNC6671, operating under the "BlackFile" brand, conducts a sophisticated extortion campaign targeting organizations through voice phishing (vishing) and single sign-on (SSO) compromise, using adversary-in-the-middle (AiTM) techniques to bypass MFA and exfiltrate sensitive corporate data.

Microsoft 365 +5 UNC6671 vishing extortion aitm credential-theft data-exfiltration sso
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