The e-mail spam informs customers that FedEx® was not able to deliver a specific package sent one month ago. The message also asks the recipients to download and print the attached invoice in order to retrieve the package. However, the attached archive does not hold the alleged invoice, but an extremely dangerous piece of malware, known as Trojan.Spy.ZBot or one of its many variants, such as Trojan.Spy.Wsnpoem.HA.

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