How to Scan your PC for DNSChanger Trojan

You might have heard about this Trojan these days. First of all, you must know what is this. According to F-Secure,

DNSChanger is a trojan that will change the infected system’s Domain Name Server (DNS) settings, in order to divert traffic to unsolicited, and potentially illegal sites.The trojan is usually a small file (about 1.5 kilobytes) that is designed to change the ‘NameServer’ Registry key value to a custom IP address. This IP address is usually encrypted in the body of a trojan. As a result of this change a victim’s computer will contact the newly assigned DNS server to resolve names of different webservers.

On July 9 2012, FBI will be shutting down all the servers which are infected with this trojan. Hence, if your PC is infected with this, you might lose Internet access from 9th July 2012 onwards.

However you don’t have to panic as you can easily check your PC for this trojan by following the steps mentioned below:

  • Go to McAfee DNS Check, the online tool released by Mcafee for this trojan.
  • Click on the red “Check Now” button and the tool will begin to check your PC for infections.
  • If your PC is safe, it will display “Congratulations, you are OK” while if your PC is infected, it will tell you the ways by which you get rid of this trojan which are particularly the Internet settings.


In future, make sure you use a good antivirus to keep your PC out of trojans and worms.

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