(LiveHacking.Com) – SMS fraud is nothing new and is one of the preferred methods of generating income for malware writers on Android and on Windows. The Russian security firm Dr. Web has discovered a piece of malware which attempts to perpetrate SMS fraud on unsuspecting OS X users. Dubbed Trojan.SMSSend.3666, it is the first program of its kind that targets Mac OS X.
With SMS fraud the malware writers attempt to subscribe victim’s to premium rate SMS services which charges high fees for useless messages. The Android variant is to cause the phone to send a message to one of these premium rate numbers.
The new Mac malware is a fake installer which can be downloaded under the guise of useful software. In this case, the Trojan pretends to be an installer for a program called VKMusic 4, a program meant for use on the VK social network. VK claims it is the largest European social network with more than a 100 million active users.
“In order to continue the ‘installation’ fraudsters ask that the victim enter their cellphone number into an appropriate field and then specify the code found in a reply SMS. By performing these actions the user agrees to terms of a chargeable subscription and a fee will be debited from their mobile phone account on a regular basis,” wrote Dr. Web.
Recent outbreaks of OS X malware have used vulnerabilities in Java, however this Trojan doesn’t use a known or unknown vulnerability, rather it is a simple social engineering ploy to trick the user into subscribing to a costly phone service. A relativity small number of OS X users will be affected as first it targets users of VK, second the OS X user needs to download the fake version of VKMusic from an underground web site.
It is anticipated that Apple’s XProtect malware utility will be updated to identify this new Trojan in due course.