Case Study: Global Law Firm achieves rapid ransomware containment and preserves client data with Illumio

Global Law Firm Stops Ransomware With Illumio

A global law firm was hit by a ransomware attack after malware entered via a phishing URL on a help‑desk workstation; within hours the threat had spread to 12 servers and put client data, back‑office operations and the firm’s reputation at risk. The core challenge was stopping lateral movement across a hybrid environment of data center and cloud workloads before the attack could cause widespread damage.

Using Illumio Core’s Zero Trust segmentation, the incident team quickly created a ring‑fence policy to isolate the compromised servers (on‑premises and in Azure) in seconds, while telemetry and real‑time maps fed its SIEM and aided investigation. The rapid containment prevented any theft or encryption of data, avoided operational disruption, and preserved client trust and the firm’s reputation.