Checking OSX (Mac) for DNS Changer Infections

Checking OSX (MAC) for DNS Changer Infections

The easiest way to check if your system is violated with DNS Changer malware is to go to one of the “are you infected sites.” www.dns-ok.us is one of the remaining active links.  An archive of the original links is maintained below. (see below). These sites only require someone to visit. The “are you infected site” will inform you if you are infected.

Note: These sites only detect for DNS Changer. You might be infected with other malware. Please take appropriate precautions to protect your computer.  Over the years, the threat from malware on your device is used to change the configuration of your home router has increased. Protecting your devices also means protecting your home.

Original DCWG “Am I Infecfed Sites

URL Language Maintainer
www.dns-ok.us English DNS Changer Working Group (DCWG)
www.dns-ok.de German Bundeskriminalamt (BKA) & Bundesamt für Sicherheit in der Informationstechnik (BSI)
www.dns-ok.fi Finnish, Swedish, English CERT-FI is the Finnish national reporting point for computer security incidents and information security threats. CERT-FI is also responsible of maintaining the national information security situation awareness system.
www.dns-ok.ax Swedish, Finnish, English CERT-FI is the Finnish national reporting point for computer security incidents and information security threats. CERT-FI is also responsible of maintaining the national information security situation awareness system.
www.dns-ok.be Dutch/French CERT-BE is the primary Belgian contact point for dealing with Internet security threats and vulnerabilities affecting Belgian interests.
www.dns-ok.fr French Le CERT-LEXSI est la division de veille et d'enquête sur Internet, dédiée à la protection du patrimoine en ligne des organisations.
www.dns-ok.ca English/French Canadian Internet Registration Authority (CIRA) and Canadian Cyber Incident Response Centre (CCIRC)
www.dns-ok.lu English CIRCL (Computer Incident Response Center Luxembourg) is the national Computer Security Incident Response Team (CSIRT - CERT) coordination center for the Grand-Duchy of Luxembourg
www.dns-ok.nl Dutch (Obsolete) SIDN (the Foundation for Internet Domain Registration in the Netherlands)
dns-ok.gov.au English CERT Australia, Stay Smart Online, and Australian Communications and Media Authority joint page on DNSChanger Information
dns-changer.eu German, Spanish, English ECO (Association of the German Internet Industry)
dnschanger.detect.my Malaysian, English Hosted by CyberSecurity Malaysia and MYCERT
dns-ok.jpcert.or.jp Japanese JPCERT/CC - Japan Computer Emergency Response Team Coordination Center
www.dns-ok.it Italiano Telecom Italia Security Operation Center - IT.TS.SOC

Manually Checking for DNS Changer Infections

The following are the original manual checks to see if your computer is infected with any of the DNS Changer malware.

To check if your OSX computer is infected, first, click the Apple icon in the top left.

Then, select “System Preferences…”

This opens the System Preferences dialog box. Locate the “network” icon. HINT: Type “network” in the top right corner search field.

This opens the Network settings dialog box. Read the “DNS Server” line. Write down these IP addresses.

Are Your DNS Settings Ok?

The malicious Rove viruses changed some peoples DNS settings to use computers they operated. Compare your DNS settings with the known malicious Rove DNS settings listed below:

Starting IPEnding IPCIDR
85.255.112.085.255.127.25585.255.112.0/20
67.210.0.067.210.15.25567.210.0.0/20
93.188.160.093.188.167.25593.188.160.0/21
77.67.83.077.67.83.25577.67.83.0/24
213.109.64.0213.109.79.255213.109.64.0/20
64.28.176.064.28.191.25564.28.176.0/20

What if I’m infected?

If your computer is infected, please refer to our page that lists tools to clean DNS Changer and other self-help guides to clean your computer – https://dcwg.mystagingwebsite.com/fix/.

It is recommended that multiple approaches to home and endpoint security are used. No one approach protects devices from the attacks which have evolved from the DNS Changer attacks.

Will bad guys change my router’s DNS setting?

Yes, bad threat-actors continue to find criminal value by taking over your DNS settings and having you use their DNS Resolvers. The DCWG and DNS Changer work was the beginning of a theme – miscreants want to invade your home.

Leave a Reply