VPNFilter is malware that targets home routers and NAS devices in order to steal files, information, and examine network traffic as it flows through the device. The FBI recently took control of this botnet and has asked the public to reboot their home routers. Rebooting will help disrupt the malware in case a home router is infected.
For a simple reset that will take care of most malware on routers:
- Reboot the router by unplugging it, waiting 30 seconds, and plugging it back in.
- Verify that you use a strong password (even for access from your own network).
- Disable remote admin features unless they are necessary.
For more information about VPNFilter and more advanced steps one can take to protect from VPNFilter and other malware that targets home routers, these websites have good information:
https://www.ic3.gov/media/2018/180525.aspx
https://blog.talosintelligence.com/2018/05/VPNFilter.html
https://isc.sans.edu/forums/diary/Resetting+Your+Router+the+Paranoid+Right+Way/23719/