Deloitte & Touche LLP, a UK-incorporated multinational professional services network and one of the "Big Four" accounting firms, leads globally in revenue and employs over 263,900 professionals providing audit, tax, consulting, enterprise risk, and financial advisory services. In 2016, the Deloitte Vigilant Services team, led by CTO Scott Keoseyan, faced the challenge of investigating Cerber ransomware linked to suspicious domains in .top and .bid top-level domains, suspecting coordinated malicious activity. DomainTools software, via Farsight’s DNSDB, was pivotal by supplying the largest historical passive DNS database, allowing the team to uncover domain connections, trace ransomware infrastructure retrospectively, attribute threats accurately, and dismantle the Cerber campaign swiftly fo

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