IronPort has warned of an increase in image-based spam. Image-based spam do not contain any text in the email, instead they contain a .gif or .jpeg file with an image.


IronPort has warned of an increase in image-based spam. Image-based spam do not contain any text in the email, instead they contain a .gif or .jpeg file with an image.

Image-based spam can bypass traditional content and signature scanning, according to IronPort.

The image in the email contains the spam message in the form of text and graphics.

Image-based spam have increased to over 12% of all spam in June 2006, compared to 1% in June 2005.

Additional findings include:

– Over 5 million image-based spam are sent every day.

– 78% of these pass through first and second generation spam filters.

– Over 80% of spam comes from zombie PCs.

– Spammers rotate through zombie networks by changing the IP address of the source of spam every few hours.

– In June 2005, the average length of advertising a domain in a spam URL was 48 hours.

– Spam volumes increased 40% worldwide in June 2006, compared to April 2006.

– In April 2006, over 35 million domains were registered.

– Out of these, 32 million were never paid for and expired.

IronPort is a provider of security gateway services for organizations.

LINKS:

For more information on the report, click here.

For more information on the company, visit IronPort.

 

 

 

 

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