According to researchers from Cisco's cyber intelligence unit Talos, Russian hackers have infected over 500,000 routers and network devices in at least 54 countries with a sophisticated malware called VPNFilter.
The malware can be used for spying, "intelligence gathering, theft of valuable information, destructive or disruptive attacks, and the misattribution of such activities."
Routers from Linksys, MikroTik, Netgear, and TP-Link have been affected.
Ukraine has previously blamed Russia of massive cyberattacks
In June 2017, the "NotPetya" ransomware, which has been called the "most destructive cyberattack ever", disabled computer systems in Ukraine. In 2016, Russia allegedly hacked Ukraine's power grid causing a nation-wide blackout. As mentioned before, they used malware to target industrial control systems.