The CSIS mantains a list of "Significant Cyber Incidents" on its Web site, reporting major cyber-attacks. The full list is available as PDF or Word files. Two members of the Center, Oltion Preka and Giampiero Giacomello, worked with Python's Pandas, Open Refine and some regular expressions to "transform" the list of events into a CSV file so that it may be easier for scholars interested in (basic) quantitative analysis of those events to work with such data incidents. In agreement with the CSIS, we make the CSV file available for download here.
CSV file of the original full list of "Significant Cyber Incidents" by the CSIS