This caused the victim’s traffic to be redirected so that hackers could see everything they do online. Once they got into the person's phone and managed to connect to a router, they changed the default DNS server address to a malicious one. In 2016, hackers created a few fake Android apps that impersonated Baidu (a Chinese search engine) and a Wi-Fi password sharing app. This is exactly how the Switcher Trojan works. The attacks can also be conducted the other way around: perpetrators can hack your phone and then infect your router. VPNFilter is very persistent, as it still can damage your network after a router is rebooted and it takes effort to remove malware from your router. This virus exploited known system vulnerabilities to install malware on affected devices and even steal users’ sensitive information such as passwords and credit card details. It has infected more than half a million routers and network-attached storage drives in more than 50 countries since 2016. VPNFilter is one of the most notorious pieces of router malware. It gives hackers a wide range of possible attack vectors, and by the time you notice that something’s wrong, it might already be too late. A single router can support your phone, laptop, smart home system, or even your electricity meter. Perpetrators can crack your password, connect to the router, modify its settings, and infect the whole network with viruses. Many people use default passwords on their routers and don’t bother to change them. While high-end routers are more secure, they can also be hacked. Cheap options have poor security, their firmware can’t be updated automatically, and it’s easy to attack them. You can buy a router for anything from $20 to several hundred dollars.
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