Mobile malware that targets specific devices made up just 1.2
percent of all web malware encounters in 2013. Although
not a significant percentage, it is still worth noting because
mobile malware is clearly an emerging—and logical—area of
exploration for malware developers.
According to Cisco TRAC/SIO researchers, when mobile
malware is intended to compromise a device, 99 percent of all
encounters target Android devices. Trojans targeting Java Micro
Edition (J2ME)-capable devices held the second spot in 2013,
with 0.84 percent of all mobile malware encounters.
Not all mobile malware is designed to target specific devices, however. Many encounters
involve phishing, likejacking, or other social engineering ruses, or forcible redirects to websites
other than expected. An analysis of user agents by Cisco TRAC/SIO reveals that Android
users, at 71 percent, have the highest encounter rates with all forms of web-delivered
malware, followed by Apple iPhone users with 14 percent of all web malware encounters
(Figure 14).
Cisco TRAC/SIO researchers also reported evidence of efforts to monetize Android
compromises during 2013, including launches of adware and small and medium-size
enterprise (SME)-related spyware.