DNSChanger, also referred to as DNS Changer and nicknamed the "Internet doomsday" virus, is a type of malware used by hackers to change a user's DNS server settings, replacing the ISP's valid DNS servers with rogue DNS servers operated by the hacker or a third party.
In November 2011 the U.S. FBI discovered a network of rogue DNS servers that were being sent traffic by computers infected with the DNSChanger malware. The FBI disabled these servers and replaced them with servers that would share valid DNS addresses.
However, in a cost-cutting move the FBI shut these servers down on July 9th, 2012, which meant computers still infected with DNSChanger would no longer be able to access the Internet unless the DNS settings for these computers were redirected to new, "clean" DNS servers.
A website set up by the group responsible for the FBI's servers (the DNS Changer Working Group) has been created to help users diagnose computers and remove the DNSChanger malware if necessary.
Stay up to date on the latest developments in Internet terminology with a free weekly newsletter from Webopedia. Join to subscribe now.
From wacky alarm clocks to lecture hall tools and after class entertainment, these Android apps are a good fit for a student's life and budget. Read More »Sharing Threat Intelligence
A growing number of startups make the sharing of threat intelligence a key part of their solutions. Read More »Smiley Faces and Symbols
A text smiley face is used to convey a facial expression or emotion in texting and online chat conversations. This Webopedia guide shows you how... Read More »
The Open System Interconnection (OSI) model defines a networking framework to implement protocols in seven layers. Use this handy guide to compare... Read More »Network Fundamentals Study Guide
Networking fundamentals teaches the building blocks of modern network design. Learn different types of networks, concepts, architecture and... Read More »Computer Architecture Study Guide
This Webopedia study guide describes the different parts of a computer system and their relations. Read More »