Proofpoint threat researchers have exposed an active account takeover (ATO) campaign, dubbed UNK_SneakyStrike, exploiting the TeamFiltration pentesting framework to target Microsoft Entra ID user accounts. Since December 2024, this malicious operation has impacted over 80,000 user accounts across hundreds of organizations, achieving several successful breaches. UNK_SneakyStrike Campaign The attackers have weaponized TeamFiltration a tool originally […]

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