网络三明治

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 每1250万垃圾邮件只有1个回复，研究显示其依然获利的细节

作者：亚当.哈特利 周一，2008年11月10日

北京时间11月10日消息，据国外媒体报道，加州大学伯克利分校和圣地亚哥分校的计算机科学家进行的一项研究揭示了垃圾邮件的盈利模式，并认为垃圾邮件制造者每发1250万封邮件，才有一个邮件回应。

研究人员通过控制一个正在运行的垃圾邮件网络，揭示了垃圾邮件制造者的致富秘诀。同时，该研究指出，尽管垃圾邮件的回复率非常低，但大规模的发送垃圾邮件每年可创造高达数百万英镑的盈利。研究还显示，垃圾邮件制造者本身也易受攻击，因此造成发送垃圾邮件成本偏高。

据悉，这一研究于今年年初开始，研究人员控制了用于传播垃圾邮件的Storm网络中的部分电脑，并进行分析。据信， Storm网络最高峰时控制有100多万台电脑。负责该项研究工作的斯德凡·萨维奇(Stefan Savage)称，研究垃圾邮件的最好办法就是自己充当垃圾邮件制造者。

研究人员创建了一些所谓的“代理肉机”，作为Storm网络和受控家庭电脑信息传递的管道。他们通过这些“代理肉 机”，共控制了75869台电脑，并通过这些电脑发送欺骗性垃圾邮件。其方式包括：一、模仿Storm网络采取病毒式传播，二、诱使网民浏览虚假医药网 站，购买提高性能力的中草药。

据统计，研究人员共发送了4.69亿封垃圾邮件其中大部分是采取的第二种方式。研究报告称，“启动后的26天内，共 发送了约3.5亿封垃圾邮件，仅有28封回复邮件产生购买”。据此，该垃圾邮件发送的响应率不到0.00001%，远低于合法的直投机构公布的平均2.15%的响 应率。

研究人员预计，整个Storm网络的操控者每天净盈利7000美元，合每年350万美元。研究人员指出，尽管发送垃圾邮件能拥有良好回报，但垃圾邮件制造者所获利润较过去人们预计得要低。

来源：网络转载和编选

Spam gets 1 response per 12,500,000 emails

New study details how junk mailers still make money

By Adam Hartley Monday 10/11/2008

A new study details how spammers – the bane of our email inboxes – still make pots of money, despite only receiving a response to one in every 12,500,000 emails they spam out.

The study, by a team of seven computer scientists from University of California, Berkeley and UC, San Diego (UCSD) infiltrated the Storm network, which uses hijacked home PCs to relay much of the junk email you spend your days wading through while wondering ‘who the hell responds to this stuff?’

Well. Now you know. One gullible idiot in 12,500,000 recipients. Or thereabouts.

Spam the spammers

“The best way to measure spam is to be a spammer,” claims the study. And they certainly picked the right network to hijack, with the Storm network having over one million machines under its control at one point.

Using ‘proxy bots’ the team of researchers managed to control 75,869 hijacked machines to conduct their own fake spam campaigns.

The researchers used two of the most popular ploys currently used by spammers – firstly offering a fake pharmacy site and, secondly, offering a herbal Viagra-style remedy to boost libido.

“After 26 days, and almost 350 million email messages, only 28 sales resulted,” says the research paper.

Yet even with this apparently abysmal response rate of less than 0.00001 per cent, the researchers still estimate that the controllers of a network the size of Storm are still bringing in about $7,000 (£4,430) a day or $3.5m (£2.21m) over a year.

Both baffling and incredibly annoying, we’re sure you will agree. For some actual useful and helpful information head over to TechRadar’s recent 50 websites you will wonder how you lived without feature.

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