May 17, 2020

SMS fraud malware now targets OS X users

(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.

Will Apple fix SMS spoofing flaw before iOS 6 is released?

(LiveHacking.Com) – As demonstrated many times, social engineering is a key method used by hackers to solicit personal information from victims and now, due to a new SMS spoofing flaw which has been discovered on the iPhone, users need to be extra careful about trusting text messages they receive on their phones.

Security researcher “pod2g” has found a serious flaw in the way iOS processes SMS messages that leaves iPhone users open to spoofing.

This means that an attacker can spoof messages from a victim’s bank asking them for some private information, or linking to phishing website and, because of the flaw, the message look genuine. Also false messages can be sent to a device and used as false evidence. In fact, pod2g writes that the spoofing can be use to do “anything you can imagine that could be utilized to manipulate people, letting them trust somebody or some organization [that] texted them.”

This flaw has existed since 2007, when the first iPhone was released, and still hasn’t been addressed with iOS 6  beta 4.

SMS messages are converted to complex PDU (Protocol Description Unit) packets  for delivery. As part of the payload, a section called UDH (User Data Header) allows the sender to add a reply-to number. If included, any replies written by the receiver will be sent to that number rather than the original number.

The problem with the iPhone SMS app is that the reply-to address is displayed rather than the genuine originator number. This means a message can be sent from one device and made to look like it came from another. What should happen is that if the reply-to and originator numbers are different both should be shown or a warning displayed.

Tools exist for smartphones and even online for sending raw PDU messages meaning that these fake messages are relatively easy to generate.

“Apple takes security very seriously,” representatives from the Cupertino, Calif.-based company told The Verge on Saturday. “When using iMessage instead of SMS, addresses are verified which protects against these kinds of spoofing attacks.”

“Now you are alerted. Never trust any SMS you received on your iPhone at first sight,” wrote pod2g.

The question now remains, will Apple fix this before iOS 6 is released?

Online Banking SMS Authentication Messages Open To Attack

RSA LogoRSA are publishing a report warning of increasing attempts by cyber criminals to intercept online banking SMS messages which are used to authenticate users for online services.

Authentication tokens (normally a randomized six digit number or similar code) sent by SMS are becoming more and more popular. For example, The Commonwealth Bank of Australia claims that 80% of its online customers use their NetCode SMS service for authentication and have recently announced that the service will now be mandatory for “higher risk” transactions. The knock-on effect will be that hackers will increase their efforts to intercept these SMS messages to gain access to online accounts.

This warning comes at a time when it is now possible to eavesdrop GSM phones with cheap off-the-shelf equipment. Of course, a two step authentication process (username/password and then authentication token) is much better than just simple login authentication. However a better and more secure approach is the use of a hand held card reader which in combination with your bank card and PIN generate a unique, one-time code for use during login.

You can read more about this on ZDNet Australia.