The number of pieces of new mobile malware in 2010 increased by 46 percent compared with 2009. The report also uncovered 20 million new pieces of malware in 2010, equating to nearly 55,000 new malware threats every day.
Of the almost 55 million total pieces of malware McAfee Labs has identified, 36 percent was created in 2010. Concurrently, spam accounted for 80 percent of total email traffic in Q4 2010, the lowest point since the first quarter of 2007.
Threats to mobile platforms are not new. However, as more consumers use mobile devices and tablets in their daily lives and at work, cybercriminals have taken note. During the last several years, McAfee Labs has seen a steady growth in the number of threats to mobile devices.
Some of the most interesting mobile threats of Q4 2010 were SymbOS/Zitmo.A and Android/Geinimi. SymbOS/Zitmo.A was a high-profile threat that struck early in the quarter. The creators of the Zeus botnet repurposed an old version of a commercial spyware package.
Android/Geinimi, a Trojan inserted into legitimate mobile applications and games for the Android platform, was one of the most important threats of the quarter.
With the adoption of so many new mobile platforms, combined with the lack of security awareness and mobile safeguards, McAfee Labs expects cybercriminals to use botnet infections to target mobile devices.
In Q4 2010, Cutwail was dethroned as the global leader in botnet activity, with Rustock the most prevalent in many parts of the world, and Bobax closely trailing behind the two.
The onslaught of malware seems to have no end, and the proliferation of both handled and IP-enabled devices’ affect on this growth remains to be seen. The top malware threats in Q4 2010 were very different in various geographies, due in part to the larger trend that threats now tend to match the types of users, habits and events that are specific to a region.
Favorites for cybercriminals worldwide this quarter consisted of AutoRun malware (Generic!atr), banking Trojans and downloaders (PWS or Generic.dx), as well as web-based exploits (StartPage and Exploit-MS04-028).
Spam hitting its lowest levels in years can be attributed to a “transition period,” with several botnets going dormant during a time of year when spam volumes are usually on an upward path.
In Q4, McAfee Labs learned the Bredolab botnet had been closed along with parts of the Zeus botnet. Around the Christmas holiday, spam from the Rustock, Lethic, and Xarvester botnets all disappeared, while the spam leaders this quarter were the Bobax and Grum botnets.
As more users access the Internet from an ever-expanding pool of devices—computer, tablet, smartphone or Internet TV—web-based threats will continue to grow in size and sophistication. In Q4, some of the most active threats included Zeus-Murofet, Conficker and Koobface, and the number of potentially malicious domains grew at a rapid pace.
Phishing URLs in the form of the IRS, gift cards, rewards accounts, and social networking accounts were also among the most popular. McAfee Labs found that within the top 100 results of the top daily search terms, 51 percent led to malicious sites, and on average each of these poisoned results pages contained more than five malicious links.
McAfee Labs expects attacks using the techniques of search-engine abuse and trend abuse to focus more specifically on new types of devices in 2011.
In 2009, McAfee Labs predicted that vulnerabilities in Adobe product would become the clear choice of malware authors and cybercriminals for distribution malware and compromising systems and networks. This prediction has come true. Throughout 2010 malware developers have heavily exploited weaknesses in both Flash and especially PDF technologies.
McAfee Labs databases reveal that malicious PDFs targeting Adobe Acrobat topped the number of unique samples by a wide margin, making them the favorite target of client-side exploitation. McAfee Labs is certain that the “Adobe” trend will continue this year, as more mobile devices and non-Microsoft operating systems support various Adobe technologies.