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Global Spam Level Reaches 95 Per Cent: Commtouch
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Pharmaceuticals and sexual enhancers are the most popular spam topics, at 30 per cent and 23 per cent, respectively.
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Friday, October 19, 2007:
Global spam levels has reached an all-time high of 95 per cent of all emails at its peak during the quarter, reports Commtouch in its Email Threats Trend Report for the third quarter of 2007. The report examines the appearance of new kinds of attachment spam such as PDF spam and Excel spam together with the decline of image spam, as well as the growing threat of innocent appearing spam containing links to malicious websites. Blended threat messages -- or spam messages with links to malicious URLs -- accounted for up to 8 per cent of all global email traffic during the peaks of various attacks during the quarter.
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"Blended spam demonstrates the ingenuity of spammers to attempt to evade detection," said Amir Lev, president and chief technology officer, Commtouch. "Most anti-virus and anti-spam technologies are not capable of blocking these types of messages, so the malware threats are allowed to penetrate the users’ computers."
According to the report, one massive outbreak mid-quarter utilised over 11,000 zombie IP addresses to host malicious websites. Leading zombie locations included the US (36 per cent) and Russia (8 per cent). Image spam declined to a level of less than 5 per cent of all spam, down from 30 per cent in the first quarter of 2007; also, image pump-and-dump spam has all but disappeared, with pornographic images taking its place.
PDF Spam represented 10-15 per cent of all spam in early July and then dropped significantly, however a steady stream of PDF spam is still being maintained at 3-5 per cent of all spam messages. Pharmaceuticals and sexual enhancers were the most popular spam topics, at 30 per cent and 23 per cent, respectively.
Commtouch’s Recurrent Pattern Detection (RPD) technology protects against spam and virus attacks. The content-agnostic technology detects and blocks spam in any language and is effective against various types of attachment spam and blended spam/malware threats. Commtouch’s GlobalView Reputation Service blocks spam at the network perimeter based on the reputation of the sender.
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