Stellium

Stellium was compromised in a ransomware attack attributed to everest in February 2026. The organization, operating in an undisclosed sector in United Kingdom, was added to the group's data leak site as part of an extortion campaign.

everest operates as a financially motivated ransomware-as-a-service (RaaS) operation, exfiltrating sensitive data and threatening public disclosure to pressure victims into paying ransom demands.

[AI generated] Stellium is a consulting firm focused on services for supply chain management optimization, such as data analytics, lean manufacturing strategies, and innovative technology implementation. They cater to multiple industries, including energy, manufacturing, technology, and healthcare, among others. Their methods revolve around the utilization of advanced data to optimize operations and produce successful business outcomes.

Intelligence correlations link this incident to 1 vulnerability(ies) including CVE-2026-3300, which may have been leveraged as initial access vectors or for lateral movement.