Finalyse

Finalyse, also known by its alias, is a Belgian financial consultancy with its headquarters located in Belgium. The firm provides consultancy services within the financial sector, though specific product lines are not detailed in the available sources. As a consultancy, it serves clients that rely on its expertise for market data and pricing information. The organisation maintains a customer base that it communicates with regarding security incidents. Its operational focus includes handling financial information and delivering advisory outcomes to partners. The company’s presence is confined to the Belgian jurisdiction as indicated by its headquarters location. No further details about size, ownership, or subsidiary relationships are disclosed in the referenced material.

On December 24, 2020, Finalyse experienced a ransomware attack attributed to the Avaddon group. The organisation responded by restoring its systems from backups and chose not to pay any ransom. Attackers asserted that they had exfiltrated approximately 98 gigabytes of data from the network. The compromised data reportedly consisted mainly of publicly available Excel files containing market data and pricing information. Finalyse evaluated the exposed material as non‑confidential and determined that it posed no risk to clients or partners. In accordance with its incident response policy, the firm notified its customers about the breach. It emphasized that no sensitive or proprietary information had been compromised in the attack. Although the threat actors threatened to release the stolen data within days, the lack of additional sensitive leverage weakened their extortion position. Consequently, Finalyse expressed no concern over the potential publication of the disclosed market data files. The episode concluded with the firm resuming normal operations without yielding to the attackers’ demands. The incident was subsequently reported in a cybersecurity news outlet.