The ECB is conducting a cyber resilience stress test at ECB-regulated banks for the first time in 2024. The aim is to assess the operational resilience of an institution's core banking systems against a serious but plausible cyber security event. The test has a two-stage structure. In the simplified approach, all institutions must complete a questionnaire within two months, provide appropriate evidence and submit a cyber incident report to the ECB. In the more in-depth approach, which affects 20 selected institutions, a recovery test for the cyber scenario must be demonstrated and a two-month on-site validation of the evidence takes place.
The ECB communicated its supervisory expectations to the banks for consultation in a workshop on 3 July 2023. Banks can submit their feedback to the ECB by 15 August 2023. The cyber resilience stress test begins on 2 January 2024 and ends for the simplified approach on 29 February 2024 with the submission of the questionnaire and evidence. The subsequent in-depth on-site validation ends on 30 April 2024.
Passing the ECB Cyber Resilience Stress Test requires cross-functional cooperation between various 1st, 2nd and 3rd LoD units in the areas of IT SCM, BCM, IT, information security, outsourcing management and in the business units. The Cyber Resilience Stress Test is designed end-to-end and requires the assessment of the economic loss as well as the involvement of (IT) service providers. The evidence goes beyond the requirement for a written policy and includes, for example, plans and tests for business continuity, response and recovery as well as internal control processes and results for ICT and security risks.