The email message below with the subject: "fixed invoice," contains a malicious attachment disguised as a fixed invoice. The fake email message was sent by cybercriminals to trick potential victims into opening the malicious attachment, which will 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. The malicious attachment is a compressed or zip file that contains a Windows Script File. This means that the malicious attachment will only affect computers running the Microsoft Windows operating system. But, it doesn't mean that recipients who are using other operating systems should attempt to open the file.