Trojan-SMS.AndroidOS.Opfake

Parent class: TrojWare

Trojans are malicious programs that perform actions which are not authorized by the user: they delete, block, modify or copy data, and they disrupt the performance of computers or computer networks. Unlike viruses and worms, the threats that fall into this category are unable to make copies of themselves or self-replicate. Trojans are classified according to the type of action they perform on an infected computer.

Class: Trojan-SMS

Programs of this type are used to send text messages from infected mobile devices to premium rate numbers that are hard code into the Trojan’s body.

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Platform: AndroidOS

Android is an open-source operating system developed by Google for mobile devices, such as tablets, smartphones, and watches. Based on a Linux kernel and the Dalvik virtual machine (older versions) / Android Runtime environment (newer versions).

Description

Malicious programs of this family display a window that imitates installation of legitimate software. During or after installation, the malware secretly sends SMS messages to premium-rate short numbers without the user's knowledge. Over time, this malware family has evolved. Instead of imitating installation of legitimate software, some Trojans in this family immediately ask the user for administrator rights on the device. The Trojans then use these administrator rights to become invisible in the list of installed apps. The family is named Opfake because early versions imitated installation of the Opera browser.

Top 10 countries with most attacked users (% of total attacks)

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