tailieunhanh - DNSChanger Malware

DNS (Domain Name System) is an Internet service that converts user-friendly domain names into the numerical Internet protocol (IP) addresses that computers use to talk to each other. When you enter a domain name, such as , in your web browser address bar, your computer contacts DNS servers to determine the IP address for the website. Your computer then uses this IP address to locate and connect to the website. DNS servers are operated by your Internet service provider (ISP) and are included in your computer’s network configuration. DNS and DNS Servers are a critical component of your computer’s operating. | DNSChanger Malware DNS Domain Name System is an Internet service that converts user-friendly domain names into the numerical Internet protocol IP addresses that computers use to talk to each other. When you enter a domain name such as in your web browser address bar your computer contacts DNS servers to determine the IP address for the website. Your computer then uses this IP address to locate and connect to the website. DNS servers are operated by your Internet service provider ISP and are included in your computer s network configuration. DNS and DNS Servers are a critical component of your computer s operating environment without them you would not be able to access websites send e-mail or use any other Internet services. Criminals have learned that if they can control a user s DNS servers they can control what sites the user connects to on the Internet. By controlling DNS a criminal can get an unsuspecting user to connect to a fraudulent website or to interfere with that user s online web browsing. One way criminals do this is by infecting computers with a class of malicious software malware called DNSChanger. In this scenario the criminal uses the malware to change the user s DNS server settings to replace the ISP s good DNS servers with bad DNS servers operated by the criminal. A bad DNS server operated by a criminal is referred to as a rogue DNS server. The FBI has uncovered a network of rogue DNS servers and has taken steps to disable it. The FBI is also undertaking an effort to identify and notify victims who have been impacted by the DNSChanger malware. One consequence of disabling the rogue DNS network is that victims who rely on the rogue DNS network for DNS service could lose access to DNS services. To address this the FBI has worked with private sector technical experts to develop a plan for a private-sector non-government entity to operate and maintain clean DNS servers for the infected victims. The FBI has also provided information to .