According to a report by Trend Micro, the education sector is the most affected by malware, with 44 percent of all infections. Also, according to an article in SC Magazine:
Based on the total number of malware samples collected in 2009, Trend Micro estimates that a new piece of malicious software is created approximately every 1.5 seconds. In addition, estimates place the number of unique new malware samples introduced every day at more than 600,000.
Trojans made up approximately 60 percent of new signatures created by Trend Micro during the first half of the year, followed by backdoors and trojan-spyware. Further, the majority of trojans lead to data-stealing malware, the report states.
