Mutter is a malware threat that is included in the spear-phishing attack. Mutter is spread via spam email messages that contain infected documents that strive to fool affected recipients into clicking on the file, which would distribute Mutter malware. One of the documents is an article about Pakistan's unmanned aerial vehicle industry written by Aditi Malhotra, an Indian writer and associate fellow at the Centre for Land Warfare Studies in New Delhi. When downloaded, the Mutter malware opens a backdoor on the compromised PCs in order to receive commands from C&C servers and to transfer stolen information. To bypass the detection, Mutter is able to stay dormant for long periods of time so that it will finally be classified as safe by security programs.