FRAMINGHAM, 1 APRIL 2011 - A malicious Android app that shamed users for pirating software transmitted personal information to a URL controlled by the legitimate app's developer, a security company said today.
The developer of "Walk and Text," the app whose code was recompiled and re-released on numerous file-sharing sites, denied the claim by AVAST Software, an anti-virus firm based in Prague.
Walk and Text, which costs $1.54 to download from the official Android Market, uses the smartphone's camera to show what's in front of users as they simultaneously walk and text, theoretically preventing them from slamming into signposts or stepping off curbs into traffic.
The Trojanized version of the app includes malicious code that texts an embarrassing anti-piracy message to each contact in the phone's address book.
"Hey, just downlaoded [sic] a pirated App off the Internet," the message reads. "Walk and Text for Android. Im [sic] stupid and cheap, it costed [sic] only 1 buck. Don't steal like I did!"
The rogue app -- which Symantec yesterday named "Android.Walkinwat" and identified as a Trojan horse -- also pilfers personal data from the phone, including the phone number and the device's unique identifier, and sends it to a remote server.
According to AVAST, that data was sent to a URL controlled by Georgi Tanmazov, the CEO of Incorporate Apps, and the developer of Walk and Text, as well as other Android apps.
"It was very obvious that the information went to his URL," said Vincent Steckler, the CEO of AVAST in an interview Friday. "Was there something receiving the information? [Tanmazov] said there was not. But from what we could see, yes, there was something there receiving the information."
Tanmazov flatly denied that he created the malicious version of Walk and Text.
"AVAST has indeed claimed there is a link to our servers, but there was no such file on our servers, and logs could probably prove this," said Tanmazov in an e-mail interview, also on Friday. "There is also no personal information being saved on our servers and this could also easily be proven."
Steckler said that he has yet to see that proof, and called on Tanmazov to share his server logs.
When asked if he would share the logs, Tanmazov agreed, but said he wasn't sure that such logs exist.
"The Web site is on a really cheap shared server and they delete stuff after three days I think," he said. "You understand that if we do have logs those are text files that could be altered so this will also not prove anything."
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