HSBC has successfully recovered from a distributed denial-of-service (DDoS) attack which saw a number of its websites brought down, making it impossible for customers to use internet banking services. The international bank stressed that no customer data was impacted by the attack in a statement posted on its website. DDoS attacks, which are illegal, occur when a. number of computers are hijacked to bombard a website with unwanted traffic. HSBC restored all of its sites globally to full accessibility as of 3:00am UK time.”]
Source: https://nakedsecurity.sophos.com/2012/10/19/hsbc-recovers-ddos-attack/