Fortinet’s FortiGuard Labs has published a very interesting whitepaper about 10 years anniversary of mobile malware. According to the study mobile malware is evolving quite rapidly - only in 2013 researchers of FortiGuard have see more than 1300 new malicious applications per day with up to 400.000 malicious applications in total.
The whitepaper goes back up to 2004 and the first mobile worm - Cabir (infecting Nokia phones) up to year 2013 and arrival of first Ransomware for Android devices - FakeDefend.
Reference: The World’s First Mobile Malware Celebrates its 10th Birthday http://www.fortinet.com/resource_center/whitepapers/10th-anniversary-of-first-mobile-malware.html http://www.fortinet.com/sites/default/files/whitepapers/10-Years-of-Mobile-Malware-Whitepaper.pdf
"Thumbs up!"
Here is an article from Symantec's Security Response:
The Tenth Anniversary of Mobile Malware https://www-secure.symantec.com/connect/blogs/tenth-anniversary-mobile-malware
DEFINITELY ensure that you have a security program on your Android!