About 1 percent of Android devices are infected with malware, according to Alcatel-Lucent's Kindsight Security Labs.
Sophos has selected its "dirty dozen" of countries that relay spam for the second quarter of 2013, and the U.S. has taken the top spot.
The malware is digitally signed and is probably used in targeted attacks, researchers from F-Secure said.
Trend Micro says it detected a targeted attack that sent malware-laden emails to representatives of 16 European countries and some Asian governments.
A new version of a file-infecting malware program that's being distributed through drive-by download attacks is also capable of stealing FTP (File Transfer Protocol) credentials, according to security researchers from antivirus firm Trend Micro.
The attackers did not exploit any vulnerabilities, but they opened up accounts and used the services as their infrastructure
Paying rewards to independent security researchers for finding software problems is a vastly better investment than hiring employees to do the same work, according to researchers from the University of California Berkeley.
Technical details and a proof-of-concept exploit have been published for a recently announced Android vulnerability that potentially affects millions of devices and allows attackers to turn legitimate apps into Trojan programs.
A report from security vendor McAfee into March attacks in South Korea, which wiped data from bank computers, shut down ATMs and crippled government websites, describes a much less conspicuous parallel operation designed to steal classified military data.
Distributed Spam Distraction attacks may last up to 24 hours, and inundate an inbox with as many as 60,000 messages, AppRiver report notes in a report.