Welcome to the September edition of the Symantec Intelligence report. Symantec Intelligence aims to provide the latest analysis of cyber security threats, trends, and insights concerning malware, spam, and other potentially harmful business risks.
The average number of spear-phishing attacks rose to 53 per day in September, after a 12-month low in August. Spear phishing activity has returned to levels seen earlier in the summer, but is still down from the 12-month average of 85 attacks per day.
The .doc file type was the most common attachment type used in spear-phishing attacks, making up more than 52.9 percent of all attachments in September. At 4.8 percent, last month’s top attachment, .exe file types, dropped to fourth.
There were only four publically disclosed data breaches that took place within the month of September, resulting in the exposure of 2.5 million...