A sophisticated, multiphased cyberattack by threat actor Muddled Libra targeted a global business. Unit 42 was called to investigate and contain five coordinated attacks over one week that exploited internal security tools. Using a five-step approach—assess, analyze, secure, recover, and transform—Unit 42 swiftly evicted the threat actor in four days, identified new TTPs in less than a day, and blocked further intrusion within 16 minutes. The incident response included isolating compromised systems, reconstructing Active Directory, strengthening third-party domain security, and enhancing monitoring and DLP protocols. Lessons learned were applied to improve long-term cybersecurity readiness and resilience.

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