Malicious Activity by Country

Between January 1 and June 30, 2007, the United States was the top country for malicious activity, making up 30% of worldwide malicious activity. This represents a minimal change from the second half of 2006, when the United States was also the highest ranked country, accounting for 31% of the world's malicious activity. For each of the malicious activities taken into account for this measurement, the United States ranked number one by a large margin with the exception of bot-infected computers. It ranked second for that criteria behind only China.

Source: Symantec Internet Security Threat Report, Vol. XII