UNC6671's BlackFile Campaign: Vishing and AiTM as a Vector to Cloud Extortion at Scale
UNC6671 operates BlackFile, an extortion campaign using sophisticated vishing and adversary-in-the-middle techniques to bypass MFA and compromise Microsoft 365 and Okta environments, exfiltrating corporate data for extortion. The attack chain circumvents traditional perimeter defences by targeting human authentication vectors rather than technical infrastructure.