The number of malware families targeting Android users has nearly quadrupled since 2011, with security firm F-Secure reporting finding 37 new families in the first quarter of 2012 alone.
F-Secure revealed the trend in its latest Mobile Threat report. The 37 new families discovered during the quarter represent a marked increase in the number of mobile threats, up from just 10 families in the year-ago quarter.
The security firm claimed that Trojans are the most common form of attack, accounting for 84 per cent of all mobile threats.
"The most interesting malware trend over recent months has been the increase in Trojans that deliver on their promises. This makes it harder for victims to know they have been victimised as there is less for them to detect," said F-Secure analyst Sean Sullivan.
The increase in Trojan numbers is indicative of a wider increase in mobile malware, with F-Secure claiming at least 3,063 malicious Android applications are currently active, a marked escalation over the 139 recorded in 2010.
F-Secure warned that many of the apps are targeting Android users' financial data, claiming 34 of the current malware families are designed to steal money from infected handsets.
The Finnish firm's findings come alongside similar warnings from other security vendors.
During an interview with V3 at InfoSec in April, Kaspersky Labs researchers claimed that the Android operating system's popularity combined with its lax app application process made it an ideal target for criminals.
Kaspersky's chief security expert Aleks Gostev went so far as to predict that Android would remain the most targeted mobile OS for at least the next three years.