Tuesday, October 7, 2008

Symantec's Report Reveals: Increase Of Spam-Sending Zombie PCs In September

Symantec has released its monthly State of Spam report.

After a 37 percent drop in botnet-related spam for August, Symantec observed a 101 percent increase in September. The growth appears to be focused in Europe, the Middle East, and Asia, with South Korea experiencing the largest increase at 4,236 percent. It was followed by Kazakhstan (761 percent), Romania (607 percent), Saudi Arabia (555 percent), and Vietnam (540 percent).

Biggest amount of active zombie machines was in Turkey, 12 percent. It was followed by Brazil (9 percent), Russia (8 percent), United States (6 percent), India (6 percent) and China (6 percent).

Symantec says that it's difficult to determine an exact reason behind the one month increase but admits that it coincides with the increase in email messages carrying links to downloadable exploits which were characterized by their use of sensational news headlines. It also coincides with an increase in email messages carrying attached viruses in the form of zip and RAR files. When looking at the geography of the virus attacks versus the zombie data there can be seen similar increases in certain countries on both accounts.

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