GCHQ bosses reveal first cyber-attack and how incident changed UK and Europe

In June 2003, a major cyber-attack transformed the UK’s cyber security landscape. A government employee flagged suspicious activity, leading to the discovery of malware designed to steal data on a workstation. It was the first time UK felt cyber threat from another nation. The attack led GCHQ to fuse signals intelligence with cyber security. This incident marked a major shift in understanding of online risks and transformed the response to such attacks.