DNSChanger Trojan Horse - A year later
SecureMac Security Bulletin
Posted: December 17th, 2008
Security Risk: Critical
Halloween marked the one-year anniversary since the DNSChanger Trojan Horse was discovered in the wild, and in that time it has grown to become the single most widespread piece of malware on OS X. In order to promote safe web browsing, SecureMac has issued a bulletin on the DNSChanger Trojan Horse, with information on common symptoms of infection, ways to check for and remove the Trojan, and a list of safe practices when surfing the web.
Symptoms of Infection by DNSChanger Trojan Horse
- Website links are redirected. When you click on a link to a website (in search engine results, for example), you will be redirected to a different site, generally advertising sites.
- Pop-up advertisements. Infected computers will sometimes display advertisements, including pop-up ads, usually for pornographic websites or enhancement drugs.
- Web pages load slowly. Web pages may take a long time to load, or time out completely when infected with the trojan horse.
Removing the DNSChanger Trojan Horse
You can remove the DNSChanger Trojan Horse with our free removal tool, available at http://www.dnschanger.com
Additionally, MacScan removes the DNSChanger Trojan Horse and thousands of other trojan horses, keyloggers, and tracking cookies. More information on MacScan is available at http://macscan.securemac.com
Safe Web Browsing Habits
- Watch where you surf. By sticking with safe, well-known websites, you will be less likely to visit a site that will attempt to infect you with the trojan horse.
- Watch what you download. Download files only from trusted sources and safe sites.
- Use security features in OS X. Turn on the built-in Firewall, and consider security software, especially when a computer is shared by multiple users.
Update! DNSChanger Trojan Horse has
evolved over time with the
now execute malicious code downloaded from remote servers. This
increases the severity of the threat.
For further security information, visit http://www.securemac.com
MacScan quickly detects, isolates
removes spyware from
Macintosh computers using both real-time spyware definition updating and
unique detection methods. The software also manages internet-related
clutter on your computer. It is designed for Mac OS X version 10.2.4 and
later, and is compatible with OS X 10.5 (Leopard).
For more information, or to download a demo version of MacScan, visit
About SecureMac: Since 1999, SecureMac.com has been at the forefront of Macintosh system security. The site not only features complete Macintosh Anti-Spyware and Antivirus solutions, but also operates as a clearinghouse for news, reviews and discussion of Apple computer security issues. Users from novice to the most advanced will find useful information at SecureMac that is designed to make their computer experience trouble free.