The police, the Financial sector Supervisory commission (CSSF), as well as all concerned clients were immediately informed of the attack.
The incident occurred during the night from Sunday to Monday.
An internal crisis task force was formed straight away to oversee the further protection of client data. Experts from stake were also consulted to get an external perspective on the situation.
So far, there are no signs of actual data having been compromised during the attack, CEO Edith Magyarics stated.
Investigations are underway to shape the source of the attack.