well in my research i found out that malicious software doesn’t usually target networking devices, but when cybercriminals do create a router virus, the damage can be considerable because cybercriminals exploits router firmware vulnerabilities , so you might want to check out for router or wifi virus syptoms.
some of the syptoms i could get are
Slower-than-usual internet:- While many things can slow down your internet speed, this can also be a sign that you need to check your router for malware.
Website redirects:- Cybercriminals can use the control they have over your router to redirect your internet traffic to compromised sites. The idea is to either get you to input your personal information, or to download and install more complex viruses.
Changes in your DNS:- By changing your DNS settings, malicious parties can sidetrack all of your traffic through their servers. Unless your traffic is encrypted, these redirects give them unfettered access to all of your online activity.
Weird software/addons/toolbars you never installed:- It’s not uncommon for viruses to force-install unknown software or bloatware (programs that take up excessive resources) on your devices.
you can browse for more.......................