When a message arrives on an infected phone, the malware switches the gadget into silent mode so that the victim does not notice new incoming SMS. Moreover, the malware can respond to such messages on behalf of the smartphone owner: response texts are also contained in the templates for when they are required. That would be making money for its creators, primarily through stealing bank card data. To do so, it overlays a phishing page on the screen with text received along with the SMS interception instructions.

The look of the page can vary, but the general purpose is to tell the smartphone owner that a money transfer is waiting for him and they should enter card details to receive it.

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To make it doubly sure, the malware creators built in a check to validate the card number. Next, Rotexy extracts the last four digits of the card number from the intercepted banking SMS and matches them against the ones entered on the phishing page. As is often the case with mobile ransomware, the cybercriminals pretend to be from some official body. As mentioned above, Rotexy can receive commands via SMS. The beauty lies in the fact that they do not need to be sent from a specific number, any will do. Note that the instructions for unblocking a smartphone are based on an analysis of the current version of Rotexy; things may be different in future versions.

More technical details about the Trojan are available in report published on Securelist. Before signing off, we should mention that you will waste less time and fray fewer nerves by simply stopping the malware from getting onto your smartphone in the first place.

Avoiding infection is not difficult, the main thing being to follow a few simple rules:. All apps on Google Play are safe: Fact or fiction? Solutions for:. Leonid Grustniy 77 posts.

The Rotexy Trojan: banker and blocker November 22, Threats. How the Rotexy banking Trojan works Rotexy spreads through SMS containing links to app download and some catchy texts that prompt people to click those links and download the app. As a baseline of protection, you should always keep your mobile or tablet updated to the more recent software issued by the manufacturer.

This will bring the latest security fixes and patches. Also, ensure to back up your data photos, music, etc to reduce the impact if something does go wrong.

Anti-Virus Apps for iOS and Android: Do You Need Them?

Further ahead, we look at mobile security software apps. As well as keeping your phone or tablet free from malware and other nasties, the best security apps will also help you avoid scams, keep your personal data private, and enable you to find or wipe a lost device. While Android is still a more controlled environment than the world of Windows PCs - where users can inadvertently pick up malware or a virus from any number of sources - malware can still sneak onto Android devices.

Google has brought in a range of features to help keep your handset safe, bundled together in Google Play Protect. This new security centre is claimed to keep bogus apps off your device, and prevent malware and scams.

The Rotexy Trojan: banker and blocker

It can also be used to track down a lost device. Most Android devices come with Google Play Protect switched on and it works automatically without you having to do anything. While Google Play Protect is better than no protection in Android, early reports after its launch indicated that it struggles to detect some malware and other threats. As with all security software, Google Play Protect will improve as it learns how to deal with threats, but if you want extra protection, go for a free or paid-for security app.

Apple iOS is considered relatively secure and cases of malware are very rare.

System Requirements

Also, maintain all the usual vigilance over other online threats, such as phishing attacks and fake shopping website trying to steal your data. Some free apps do all the basics brilliantly. If your only concerns are malware, a free app is the obvious choice.

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If you have a pricey Android device, it may be worth investing in a paid-for security app. As well as offering malware protection and anti-spam tools, they often offer useful features, such as cloud-based online backup and the ability to remotely wipe a lost or stolen device. While free mobile security apps will usually only offer very basic functions, if you pay for software you can access a range of more premium features. Although each package will vary, here are some typical features on offer.

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Anti-phishing : Sniffs out dodgy-looking links and should bar you from accessing potentially dangerous websites designed to infect machines or steal your personal data. App lock : Lets you protect certain apps and settings with a password to restrict who can use or edit them. Backup : Preserves your personal information by saving it online using 'cloud' internet-based storage, as well as on your device.

Backup happens either according to a schedule or before you complete a remote wipe. Backups can then be restored to any compatible device. Privacy adviser : Scans and checks any apps you try to download, telling you which ones are asking for more access than they really need.

Remote lock : Locks down your device remotely via SMS or web browser interface, preventing unauthorised access. Some apps even allow you to create a customised lock-screen message that displays your contact details to aid the safe return of your device. Remote photo : Helps identify unauthorised users of your phone or tablet by taking their photo and sending it to you via email.