Google has used a “kill switch” to clean up phones hit by rogue Android applications, which could have been used to view and steal key information from users.
Almost 60 malware-infected programmes were found on the Android Market on 1 March and estimates suggest they may have been downloaded by 200,000 users.
The malicious apps hid data-stealing code inside games, utilities and other programs.
The “kill switch” allows Google to remotely uninstall software from handsets running its operating system.
58 malicious applications were removed from the Android Market by Google soon after it was alerted to their presence.
It suspended the accounts of the developers who apparently uploaded the apps, and also contacted the police.
The malicious code inside the applications used vulnerabilities in early versions of Android’s operating system to view and steal key information such as a phone’s unique ID number.
It also opened a backdoor onto the phone which would have allowed attackers to install any code they wanted.
In a blog posting, Google said it had activated the remote application removal following an internal investigation.
The company plans to push out a security update, designed to close the loopholes that the malicious applications took advantage of.
It is not clear when this will arrive on handsets, as in many cases the timing will be under the control of mobile operators rather than Google.