The Dutch Central Bank (DNB) has issued warnings to consumers about phishing e-mails, following a series of DDoS attacks on banks. ABN Amro, ING and Rabobank were the victims of long-term DDoS attacks on several occasions last weekend and earlier this week; these led to the disruption of online services. The Tax and Customs Administration and Dutch national ID system DigiD were also affected.
DNB said there is a chance that the number of phishing emails will now increase, following these DDoS attacks. “It is not unusual for DDoS attacks on banks to be followed by an increase in phishing mail to account holders. Criminals often attempt to use the agitation around digital attacks to make people feel vulnerable, and to then extract sensitive bank account details.
The recent DDoS attacks on the banks were advanced, according to the DNB. Banks have in place strong defensive measures to ensure that services are available through websites and internet banking. The banks have been in constant consultation with each other during the few last days and have worked together with the authorities, including the DNB and the National Cyber Security Center. For such situations, multiple consultation structures have been set up, aimed at normalising payment transactions as quickly as possible.