Kaspersky Lab, ok...

September 2006 Kaspersky Lab presents its half−yearly report on malware evolution. Kaspersky Lab has announced the publication of the Kaspersky Security Bulletin, a half−yearly analytical report on malware. The report, written by Kaspersky Lab virus analysts,looks back at trends in malware evolution over the last six months and makes predictions for the future evolution of malicious code. Among the findings: a) The number of new malicious programs (including modifications) each month increased by an average of 8 percent compared to the same period in 2005; b) Trojan programs are developing faster than any other class of malicious code; c) Viruses and worms have, as a class, been experiencing a steady decline for more than a year. The number of new modifications has fallen across the class, from viruses, to e−mail and other worms. This decline is caused by simple economics; it is less expensive to develop a primitive Trojan program than to create self−replicating malicious code such as a worm.

Source: http://www.viruslist.com/en/analysis?pubid=198968167