This solution is a SIEM system customized to the Finance Sector security. It provides scalability and distribution in security events processing through a cluster of nodes, and capacity to raise security alerts from a business perspective based on events collected from different data sources at different layers. XL-SIEM is ATOS technology built over the Alien Vault Open Source SIEM (OSSIM). It improves the traditional SIEM capabilities offered by OSSIM based on integration of the Esper high-performance correlation engine.