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Symbian Trojan steals money from smartphones

Kaspersky warns of new SMS malware

Hackers have discovered a new way to steal your money: texting it out of your mobile phone.

Security vendor Kaspersky Lab has spotted new variants of a Trojan horse program that do just that, by taking advantage of a feature that lets mobile-phone users in Indonesia use SMS text messages to transfer money in their mobile accounts from one phone to another.

The software is a variant of the Trojan-SMS.Python.Flocker malware, originally written by Russian fraudsters. This software had been used to sign unwitting victims up for expensive mobile services such as ringtones, presumably with the program's authors getting a healthy kickback. "It seems like some Indonesian guys had a look at this stuff and thought, 'Hey, we could do this in Indonesia,'" said Roel Schouwenberg, an antivirus researcher with Kaspersky.

For the attack to work, the victim must first be tricked into downloading the Python.Flocker program onto a Symbian-based mobile phone. Once installed, the software uses a feature available to Indonesian mobile-phone users that lets them send a short SMS message to another subscriber that transfers the money into their account. The Trojan transfers the equivalent of between US$0.45 and $0.90, depending on which version of the program is installed.

The Symbian operating system is used in phones made by Nokia, Motorola, Samsung and Sony Ericsson, among others.

Criminals have created banking Trojans for the PC that silently transfer money during online banking sessions, but this is the first time Schouwenberg has seen this type of behavior on a mobile phone.

Schouwenberg did not know which Indonesian mobile service provider was targeted in this attack.


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