The amount of e-mail-borne malware attacks jumped dramatically during the month of September, according to security researchers at MX Logic and Symantec. In its “October Threat Forecast & Report,” security vendor MX Logic reported that 5.14 percent of all e-mails in September contained malware, more than twice August’s percentage and more than five times January’s rate of 0.95 percent. Symantec had similar findings in its October “State of Spam” report, where the vendor reported the percentage of e-mails with malicious code multiplied about 12 times between June and September. “The two largest contributors to this increase in September were e-mails purporting to be an iPhone game and fake FedEx delivery notifications,” said Sam Masiello, vice president of information security at MX Logic.