(WEB HOST INDUSTRY REVIEW) -- Email security provider eleven (www.eleven.de) announced on Wednesday that overall scam 419 levels in March were 36 percent below scam levels in the previous month.
The eleven email security report found that the shutdown of Rustock botnet by US authorities with Microsoft on March 16, 2011, led to the reduction in spam levels. Within 24 hours of the shutdown, spam levels fell by 60 percent.
Though scam saw a decrease in March, the level of malware sent via email increased significantly. According to eleven, the amount of malware-infected emails doubled in March compared to the previous month.
Apparently, this is an expected "reaction to botnet takedowns, where spammers attempt to make up for lost infrastructures by sending mass quantities of Trojans." According to eleven, Trojans were primarily camouflaged as notifications from courier services.
eleven says the decline in spam is the first time that it had fallen below the 90 percent mark since 2009.
The report says that the US is the top third spam source country, with India in the lead and Russia in second place.
February and March 2011 saw an increase in targeted phishing campaigns against banking customers. Current events were also used for deceptive objects including the earthquake and tsunami in Japan where spammers set up fraudulent donation sites.
The complete report can be found on the eleven website.
Last month, eleven released its annual survey which found over half of German IT managers say spam levels have considerably increased over the past year.