Colt Technology Services Hit by WarLock Ransomware, Causing Multi-Day Outages
Colt Technology Services, a leading multinational telecommunications firm based in London, has confirmed a data breach by the Chinese-linked WarLock ransomware group. The incident, which occurred in late March 2025, has led to multi-day outages for several of the company's services.
The WarLock group, active since at least March 2025, is known for using leaked encryptors like LockBit and Babuk. They have been putting stolen data up for sale on the Ramp cybercrime forum. While the exact identity of the hacker who targeted Colt remains unknown, the company has been working diligently to restore its disrupted systems.
Colt Technology Services specializes in providing high-performance connectivity and communication solutions for businesses. The breach resulted in outages for hosting, porting, Colt Online, and Voice API services, causing significant disruption to the company's operations and its clients.
Colt Technology Services has confirmed the data breach by the WarLock ransomware group, with the hackers using leaked encryptors and putting stolen data up for sale. The company is actively working to restore its systems and resume normal operations. The incident serves as a reminder of the evolving threat landscape and the importance of robust cybersecurity measures for businesses.
