Some malware/hackers may not be subtle once they have infected your router, they will change the router’s credentials. If the settings have changed and the DNS server doesn’t match your ISP’s or the one you had changed to, that is a red flag. By default, your router uses a DNS server provided by your internet service provider (ISP), and these settings are auto-configured. You can also use a Wi-Fi network scanner utility for this task. You will then cross-check and review the IP addresses and device connections. To check for unknown devices, you will need to log into your router.
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At times, you may get requests to install software you didn’t even download. Besides spoofed websites, you may also notice unfamiliar apps you didn’t install on your devices. These unexplained changes may point to router DNS hijacking. At times, the sites may be flagged by your antivirus. For instance, you may notice more ads or a lack of the HTTPS certification (no padlock sign in the URL). Your popular sites may have additions to their URL, or they may behave differently.
However, a slower internet connection doesn’t necessarily mean your router is infected. This is because your bandwidth will be used for malicious activities such as redirecting traffic to and from various destinations as directed by the malware. A router malware infection may cause your connection to the internet to be painfully slow. If your router is infected or its DNS has been hijacked, you should notice the following tell-a-tale signs. At times, the warning from Avast antivirus might be a false positive.
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