F-Secure has identified the three China-based companies as the creators of “Sexy Space” Trojan, which was revealed last week went through the Symbian Foundation for a digital signature process.

Xiamen Jinlonghuatian Technology, Shenzhen ChenGuangWuXian technology and XinZhongLi in Tianjin mask the malicious software, also known as Yxe, and submitted it to the Symbian Foundation, in accordance with its Express Signature program, security company F-Secure said in a statement Wednesday.

Developers must provide mobile applications for Symbian Foundation to assess, to the requests are accepted and included for mobile phones works with the operating system Symbian. In the Apps first automatically scanned for viruses. Then, random samples are submitted for audit. Sexy space, have not been subjected to human control, Symbian chief technologist safety Craig Heath said last week.

F-Secure senior manager of security response, Chia Wing Fei, explained that the Trojan would allow attackers to send a link via a text message on the malicious web sites and quick mobile recipient to download the worm. Once the malware is installed, it can send the same text messages to all contacts listed on the phone.

“These messages are sent in your name and phone number,” said Chia. “This means that you’ll pay for each SMS sent by the worm. The typical cost of one text message can be 5 cents. If you have 500 contacts in the phone memory, infection will cost you ($ 25).”

According to F-Secure, it is first defined text messages the worm.

In the Symbian Foundation has become aware that a Trojan Sexy Space earlier this month, and the signature has been withdrawn. But one error in the Symbian application server means are still available for download until the last week.

F-Secure said that, although the problem is currently not widespread, there were several confirmed reports in China and the Middle East until now.

All Symbian Series 60 third edition phones Nokia, LG and Samsung are potential targets of malicious programs, including popular models such as the Nokia N95 and Nokia E71, said, F-Secure. In the Symbian platform is used in just under 50 percent of all smartphones.