Trojan.DNSChanger

Trojan.DNSchanger is Malwarebytes’ generic detection name for Trojansthat change a systems’ DNS settings without the user’s knowledge or consent.

Once the systems are infected by Trojan.DNSChanger and their DNS settings modified, systems use foreign DNS servers set up by the threat actors. Infected systems that attempt to access specific sites are redirected to sites specified by these threat actors.Domain Name System (DNS) is known as an Internet standard for the assignment of Internet Protocol (IP) addresses to domain names. Simply put, DNS interprets human-friendly host names to PC-friendly IP addresses.It is common for users to automatically use DNS servers operated by their ISPs. Users who prefer more secure, faster, and reliable DNS servers usually go with a third-party serviceas ISP-administered DNS servers can be slow and unreliable.DNS changers/hijackers are sometimes bundled with other malware, such as rootkits, for example in the old TDSS family. Fake antivirus (FakeAV) programs have also been used to spread DNS changer Trojans, as seen in Rove Digital.

Malwarebytes blocks Trojan.DNSChanger

You can use the Malwarebytes Anti-Malware Nebula console to scan endpoints.

Nebula endpoint tasks menu

Choose the Scan + Quarantine option. Afterwards you can check the Detections pageto see which threats were found.

On the Quarantine pageyou can see which threats were quarantined and restore them if necessary.

A reboot is often required to flush the “poisoned” DNS cache.