[image: InformationWeek] <http://www.informationweek.com/> 

Trojan Destroys Mobile-Phone Data, Forces Owners To Reformat 

A new Trojan horse hitting *Symbian 60 Series* handsets makes the phones 
useless until they're reformatted, deleting all the stored data, a Finnish 
security firm said Wednesday.

By TechWeb News <http://www.techweb.com/headlines_week/>
April 6, 2005 
URL: http://www.informationweek.com/story/showArticle.jhtml?articleID=160501490 


A new Trojan horse hitting Symbian 60 Series handsets makes the phone 
useless until it's reformatted, deleting all the stored data, said a Finnish 
security firm Wednesday. 

F-Secure said that the Fontal.a Trojan installs a corrupted font file into 
targeted handsets, causing them to fail at startup. Rebooting the phone by 
turning it off, then on, only compounds the problem, since the phone then 
essentially locks up. 

"Currently the only known way to disinfect a phone that is infected with 
Fontal and is rebooted, is to reformat the phone, thus loosing all data on 
the phone," said F-Secure in its online advisory. 

Because Fontal.a is a Trojan -- unlike a worm, it doesn't propagate on its 
own -- the most likely way for users to infect their phones is to download 
files via IRC or P2P file-sharing to a PC, then install that malicious file 
on the phone. 

Mobile threats are increasing not only in number, but in damage done. While 
earlier issues with cell phones have largely revolved around Cabir, and a 
new variant dubbed
Mabir<http://www.mobilepipeline.com/showArticle.jhtml?articleID=160403675>Monday,
Fontal is one of the first to actually shut down the phone and force
users to erase all data. 

"An infection can be expensive," said Mikko Hypponen, F-Secure's director of 
anti-virus research. "I have 1,700 addresses in my phone's address book. 
Think how hard that would be to reproduce." 

Symbian, the most popular operating system used by handset makers, is the 
most common target for mobile hackers. Symbian 60 Series is used in handsets 
made and sold by the likes of Nokia, Samsung, Siemens, Panasonic, and 
Lenovo. 

F-Secure's listing for Fontal.a can be found
here.<http://www.f-secure.com/v-descs/fontal_a.shtml>

Copyright (c) 2004 CMP Media LLC <http://www.cmpnet.com/> 

       
http://www.informationweek.com/shared/printableArticle.jhtml?articleID=160501490


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