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Major Botnet Crackdown Curb Spam Emails

Diagram of the sending of spam e-mail.
Image via Wikipedia

According to security firm, Symantec, the global number of spam e-mails have dropped by almost half since August this year. The fall, of around 47% in three months, is said to be due to the arrests of hackers behind several spam-sending botnets, and intelligence that has seen several spamming systems closed down globally. This recent success against hi-tech spammers has been attributed to the implementation of more effective measures and international corporation in tackling suspected botnets, through which the vast majority of junk e-mails are sent.

Whilst many botnets were shut down, one of the most significant botnets takedowns was the Pushdo or Cutwail botnet which is believed to have been sending about 10% of global spam since 2007. Once traced, the Pushdo servers were turned off in an international operation co-ordinated by LastLine – a security firm- which rendered the  large number of hijacked machines useless. Other botnets which were shut down include Bredolab, whose activities were believed to involve around 30 million computers, capable of sending 3.6 billion e-mails per day. It’s discovery led to the closure of 143 associated servers.

Talking Point

Are computer security firms fighting a lost cause against spammers seeing that millions of machines around the globe are continuously being turned into spam-sending botnets?

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5 Comments

  1. This is a reminder of how the years go by and spam increases, yet there remains no effective technology for stopping the spam at its sources — spam filtering is extremely crude, in the sense that the traffic floods the Internet and just gets caught at the last steps in the delivery.

  2. Yes,spam filtering is extremely crude, in the sense that the traffic floods the Internet and just gets caught at the last steps in the delivery.

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