A new malware campaign targeting smartphone users in the US is the latest sign that mobile devices are becoming the next big target for cyberattackers.
Kaspersky this week said its threat-monitoring systems had detected malware known as the Wroba Trojan, which targets Android and iOS device owners in the US with a fake package-delivery notification.
Android device users who click on a link in the notification are taken to a malicious site with an alert that warns users about their mobile browser being out of date and needing to be updated. Users tricked into clicking “OK” to download the purported browser update end up installing the malware on their device instead.
The download does not work on iPhones. So, users of iPhones who fall for the fake package-delivery notification are instead sent to a phishing page designed to look like Apple’s login page, which attempts to steal their Apple ID credentials.
Once Wroba is installed on a device, it can carry out a variety of malicious activities, according to Kaspersky. This includes sending fake SMS messages, checking installed packages, accessing financial transaction data, stealing the user’s contact list, and serving up phishing pages for stealing credentials, including those associated with bank accounts.
Kaspersky malware analyst Alexander Eremin says the origins of the phone numbers being targeted in the latest campaign are unclear. He surmises they could either be targeted at random or are, for example, numbers stolen from some e-commerce service that performs package deliveries.
In some aspects, Wroba is not unlike other mobile malware — like its distribution via SMS. “But it utilizes some unusual techniques to hide its communication with its command-and-control [C2] server, like using MessagePack format and DES encryption to send the data.”
Wroba also has the ability to update its list of C2 servers with the help of information in social media accounts. The C2 information, for example, might be stored in encrypted form in the “Bio” or similar field in a social media…