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McAfee reports surge in Android phone and tablet malware

Security vendor's report suggests Android users are at increasing risk.

Android

The number of malware samples detected by security researchers has risen sharply in the second quarter of this year, claims a new report from McAfee.

So much so, the security company claims the second quarter of 2012 gave rise to the biggest increase in malware for four years.

The researchers identified a 1.5 million sequential rise in malware samples from the previous quarter, which is consistent with the growth in mobile use. Almost all of the new malware was targeted at Android users.

The mobile OS was the focus of SMS-based malware, mobile botnets, spyware, and destructive Trojans, claims McAfee.

"Over the last quarter we have seen prime examples of malware that impacted consumers, businesses, and critical infrastructure facilities," said Vincent Weafer, senior vice president of McAfee Labs.

"Attacks we've traditionally seen on PCs are now making their way to other devices."

Other new threats include mobile "drive-by downloads", "Twitter-controlled botnets", and "ransomware."

The latter has steadily increased each quarter and has become a popular avenue for cyber criminals, the report claims.

Damage can range from loss of photos and personal files to data encryption and demands for money from large enterprises.

Ransomware is especially challenging as it can hold computers and data hostage, instantly damaging machines.

Botnets are also on the increase this quarter, with infections reaching a 12-month high.

The US is at the epicentre of botnet control servers, with new methods for control also uncovered. These include the use of Twitter for mobile botnet command and control. As such, the attacker can tweet commands with relative anonymity and all infected devices will follow them.

Around 1.2 million new thumb drive samples were spotted alongside almost 1.6 million samples of new password-stealing malware, which collects account names and passwords.

This quarter McAfee Labs recorded an average of 2.7 million new bad URLs per month. In June, these new URLs were related to about 300,000 bad domains, which is equivalent to 10,000 new malicious domains every day.

Of the new bad-reputation URLs, 94.2 per cent host malware, exploits or code that have been specifically designed to hijack computers.

Weaver said that the report "highlights the need for protection on all devices that may be used to access the Internet."

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