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iOS is considered to be the most secure operating system on the market, but yesterday there was a disturbing news about a virus that can infect iPhones and iPads via USB. Not that there isn't any malware targeting iOS, but it was only targeted at users who had jailbroken their device, compromising the system's security among other things. A virus called WireLurker is even more worrying, as it can attack even non-jailbroken devices.

The malware was discovered yesterday by researchers from Palo Alto Networks. WireLurker appeared on the Chinese software store Maiyadi, which hosts a large number of games and applications. Among the attacked software were, for example, the games Sims 3, Pro Evolution Soccer 2014 or International Snooker 2012. These are probably pirated versions. After launching the compromised app, WireLurker waits on the system until the user connects their iOS device via USB. The virus detects if the device has been jailbroken and proceeds accordingly.

In the case of non-jailbroken devices, it uses the certificate to distribute company applications outside the App Store. Although the user is warned about the installation, once they agree to it, WireLurker gets into the system and is able to obtain user data from the device. The virus thus practically does not use any security hole that Apple should patch, it only abuses the certificate that allows applications to be uploaded to iOS without Apple's approval process. According to Palo Alto Networks, the attacked applications had over 350 downloads, so several hundreds of thousands of Chinese users in particular may be at risk.

Apple has already started to address the situation. Blocked Mac applications from running to prevent malicious code from running. Through its spokesperson, it announced that “the company is aware of a downloadable malware on the site that targets Chinese users. Apple has blocked the identified apps to prevent them from running”. The company further revoked the certificate of the developer from whom WireLurker originated.

According to Dave Jevans of mobile security firm Marble Security, Apple could further prevent the spread by blocking the Maiyadi server in Safari, but that would not prevent users of Chrome, Firefox and other third-party browsers from visiting the site. Furthermore, the company could update its built-in XProtect antivirus to prevent the installation of WireLurker.

Source: Macworld
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