Saturday, July 14, 2012

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What is DNSChanger? 
DNSChanger is a Trojan horse malware with many variants. It changes an infected computer's DNS settings to point to rogue, bad guy-controlled servers. These then show you ads that look real, but aren't. Basically, it redirects your legitimate Web surfing to malicious Web sites that then attempt to steal personal information and generate illegitimate ad revenue.

What does DNSChanger do? 
DNSChanger changes your Domain Name System settings without your permission. This is bad because DNS is basically the Internet's phone book crossed with a map. DNS links a URL, such as yahoo.com, to an IP address. (An IPv4 address would be something like 192.1.56.10, while an IP
v6 would look like 1050:0:0:0:5:600:300c:326b.) DNSChanger changes that and redirects search results and URLs to malicious sites that are designed to either serve you ads to malicious sites, or intend to illegitimately collect your login information.

How can I avoid malware like DNSChanger in the future?
Security suites aren't perfect, but they will protect you from the vast majority of threats out there including DNSChanger. Whether you're on Windows or Mac, Anroid or iOS, you really ought to have some kind of security program installed. And always double-check the URL before entering personal information into any kind of online text field or form, no matter what operating system or device you're using.