The email message below with the subject: "Corresponding Invoice," contains a malicious attachment disguised as a purchase order. The fake email message was sent by cybercriminals to trick potential victims into opening the malicious attachment, which will redirect them to malicious websites, in an effort to infect their computers with a virus, Trojan horse, spyware or some other malware. Therefore, recipients of the fake and malicious email message should delete it and should never attempt to open the malicious attachment. Recipients of unexpected compressed or "zip" files should never open them, because this is how cybercriminals are attempting to trick their potential victims into opening malicious attachments and infecting their computers with malware.