Spammers adopt stealth tactics


Botnet controllers are switching to stealth tactics in a bid to avoid detection. Instead of mass mail-outs of spam and malicious code, they are adopting slower distribution tactics in a bid to avoid appearing on corporate security radars.

UK-based web security firm BlackSpider Technologies reports that one huge botnet, responsible for issuing 50m identical spam emails per day, compromises at least 150,000 distinct IP addresses. The use of a large number of machines - each sending out an average of 330 emails a day or around 40 per hour during the course of a working day - is a change from days of yore when a handful of compromised email servers would have been used to do the same job. Spammers adopt stealth tactics | The Register

Linked by shanmuga Monday, 20th February 2006 8:52PM