Zombie computers are those machines that are hacked by spammers with the help of computer virus so that they may be used as a host to send out thousands of spam messages. A study conducted by McAfee earlier this year showed that USA, Brazil and India are among the leading nations when it comes to producing spam. However, the report noted that China, USA and Brazil are countries that host the maximum number of zombie computers. India is nowhere in the top 10.

In a somewhat contrary note, CommTouch has come up with its latest quarterly security report where the researchers have noted that India has just overtaken Brazil as the country with the largest number of zombie computers. According to the report, here are the top ten countries and the percentage of zombie computer that they host.

1. India : 13%
2. Brazil : 11%
3. Vietnam : 6%
4. Germany : 5%
5. Russia : 5%
6. USA : 4%
7. Argentina : 3%
8. China : 3%
9. Saudi Arabia : 3%
10. Italy : 3%
11. Columbia : 2%
12. UK : 2%
13. Argentina : 2%
14. Romania : 2%
15. Poland : 2%

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