June was a huge month for malicious email campaigns. There was a big rise in the volume of malicious messages sent, and many companies were hit by spear phishing campaigns. Major news events this month, such as the death of Michael Jackson and the Air France plane crash, led to new targeted spam campaigns.
It was a month of mass compromises as well, with compromise campaigns such as Beladen and Nineball infecting tens of thousands of Web sites. Twitter and the URL shortening services used on it were also targeted this month. Microsoft patched several zero-day vulnerabilities, but more of them continue to surface. Unfortunately, reports this month show that most computers are not fully patched.