Premium-rate SMS trojan shares code with SpyEye variant

Share this article:
Researchers have discovered a group of premium-rate SMS trojans that share code with Spitmo, a mobile variant of the notorious banking trojan SpyEye, according to F-Secure.

The so-called “cousins of Spitmo" are premium-rate SMS trojans that target Russian users of Symbian and Windows Mobile phones, Sean Sullivan, security adviser at F-Secure, told SCMagazineUS.com on Thursday. The malware was named OpFake because the installer purports to be an updater for Opera Mini, a mobile web browser.

Once installed on a victim's phone, OpFake sends SMS messages to Russian-based premium-rate numbers without the owner's consent, Sullivan said. The malware then prevents messages that verify the text went through from being sent back to the user's phone.

The source code used to intercept incoming messages is nearly identical to that in Spitmo.

Earlier this week, F-Secure analysts discovered 54 OpFake samples while testing a new automation system they developed to scan and analyze Symbian malware, Sullivan said. When looking deeper into the OpFake Symbian binaries, researchers uncovered a St. Petersburg, Russia-based IP address for a server that was also storing Windows Mobile versions of OpFake.

That means the malware writers may also be targeting other mobile operating systems, Sullivan said.

“We would be pretty surprised if they didn't have some version for Android in the works, if they don't have it already,” he said.  

Researchers have reported the malicious server's IP address to CERT-FI, the Finnish national computer security incident response team.

Share this article:

Sign up to our newsletters

More in News

Research shows vulnerabilities go unfixed longer in ASP

Research shows vulnerabilities go unfixed longer in ASP

A new report finds little difference in the number of vulnerabilities among programming languages, but remediation times vary widely.

Bill would restrict Calif. retailers from storing certain payment data

The bill would ban businesses from storing sensitive payment data, for any long than required, even if it is encrypted.

Amplification, reflection DDoS attacks increase 35 percent in Q1 2014

Amplification, reflection DDoS attacks increase 35 percent in ...

The Q1 2014 Global DDoS Attack Report reveals that amplification and reflection distributed denial-of-service attacks are on the rise.