Windows malware has managed to make its way onto Apple's iOS App Store. It's likely to have been an accidental screw-up, but it nonetheless raises concerns about Apple's app-screening process.
The malicious Windows executable was found by a user who downloaded an app called "Instaquotes-Quotes Cards For Instagram" from iTunes before his security software warned him that the file was infected with a worm. A closer look at the incident, which might have easily been a false alarm by his security software, a not infrequent occurrence, revealed that the threat was all too real.
The file contained a worm variously identified as CoiDung-A by Sophos, Worm-VB-900 by ClamAV and VB-CB by Microsoft. Apple pulled the Instaquotes app from the iOS App Store on Tuesday, shortly after it emerged that the app was tainted with malware. The worm at the centre of the security flap is quite old, and hence widely detected, and not especially potent.
The user who downloaded the app posted his discovery on the Apple Support Communities discussion board, where other users were quickly able to confirm that warnings generated by security software were well-founded.
Reference:
http://www.theregister.co.uk/2012/07/26/windows_malware_ios_app_store_shocker/