Kaspersky Lab, a leading secure content and threat management solutions developer, recently released a report saying the decrease in spam in 2012 was caused by a heightened use of anti-spam protection among Internet users worldwide.
As of the end of the year, the percentage of spam ended at 72.1- 8.2 percent less than in 2011, according to the Spam Report 2012 by Kaspersky Lab.
Last year also saw a comparably huge decline in spam volumes than in 2010, reporting with 82.2 percent, and in 2011, which reported 80.3 percent spam volumes. The shuttering of several botnet command centers and pharmaceutical affiliate programs in 2012 also contributed to the spam volume decline.
Apart from the use of anti-spam applications, another reason for the decline of spam is the use of mandatory DKIM (domain key identified mail) signature policies by email providers. DKIMs are digital signatures that verify the domain from which emails are sent.
Darya Gudkova, Kaspersky Lab Head of Content Analysis & Research said that the percentage of spam decreased over the course of the year, and during the final three months of 2012 the figure remained below 70 percent.
But even with the decline of spam volumes in 2012, there were some major changes in terms of the source country of spam. China was suddenly thrust into the top of the list of spam sources for 2012, contributing 19.5 percent of all unsolicited email. This is unprecedented as China was not even in the top 20 spam sources in 2011, which was topped by India then.
The entry of China in the top list already increases Asia’s ranking as the primary regional source of spam, rising 11.2 percentage points for 2012, finally contributing 50 percent of all spam. North America took second place with 15.8 percent last year.
Among the top 20 countries that are sources of spam for 2012 is the Philippines contributing 1.1 percent. It is ranked among the last 10 countries contributing less than two percent of the overall spam.
Kaspersky Lab also reported that despite the decrease in overall percentage of spam in mail traffic, the proportion of emails with malicious attachments fell only slightly to 3.4 percent.
The company said this is still a significantly huge percentage since it only reflects emails with malicious attachments and not spam messages containing links to malicious websites.
In 2012, Trojan-Spy.HTML.Fraud.gen was the most common malicious attachment. The fourth quarter saw a change and the most prevalent malicious attachments were Trojan-Spy.Win32.Zbot.fsfe and Trojan-PSW.Win32.Tepfer.cfwf.
These three malware were designed to steal user account information such as usernames and passwords. Fraud.gen and Zbot specifically targeted passwords from financial and payment systems, while Tepfer stole other types of passwords.
Kaspersky Lab reminds Internet users to keep safe: when you receive an email, make sure that it was actually sent from the resource that it claims to be. Never click on links in suspicious emails, and remember, it is critically important to update your software regularly.