Case Study: Large UK local authority achieves real-time AD visibility and halts Brute Force & Golden Ticket attacks with Tenable Networks' Tenable.ad

Gaining Visibility Into Ad Security Due to Rising Attacks + Regulation Requirements

A large UK local authority serving 17,000 employees faced rising cyberattacks and strict regulatory oversight while processing sensitive citizen, NHS and commercial data. Their single-forest Active Directory needed better visibility and continuous monitoring to detect and stop attacks that could lead to data breaches, regulatory fines and service disruptions.

They deployed Tenable.ad and immediately received real-time alerts that uncovered recurring Brute Force and Golden Ticket attacks during a long weekend. Using the alerts they quickly disabled targeted accounts, traced activity to an infected server (taken offline), reset Kerberos credentials and removed compromised devices—stopping the attacks, preventing data loss and fines, and establishing ongoing AD monitoring and improved security posture.