McAfee, Inc. has announced the latest trends in spam for the month of August. Two of the many statistics McAfee anti-spam researchers monitor are the duration of spam campaigns and the number of unique URL addresses used by spammers in campaigns over a given period. Current trend data indicates that the major spam campaigns are, on average, cycling through 72 per cent more domains per hour than just one month ago.
Spam messages usually contain URLs that link to Web sites where users can purchase items ranging from discounted products and medicines to other services. Spammers tend to use multiple URLs in their campaigns as way of surpassing anti-spam defenses, however they have recently stepped up their activity, using many more URLs than usual and cycling through them faster as well.
[This trend has recently been noticed by a number of spam filter producers and is one among many and constantly changing filter countermeasures brought to bear by spammers. We're currently preparing an article abut these trends for publication either in ISB or on the heisec web site. --Ed
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www.mcafee.com/us/enterprise/products/email_web_security/index.html
Taken from Information Security Bulletin.