How to Protect Yourself Against Botnets --- Malware in apps, devices can be a back door into your home network

 

 

“There's malware lurking in shady smartphone apps and cheap off-brand household electronics. It has allowed operators of massive so-called botnet networks to use people's home and wireless network access for dangerous hacking sprees and other criminal activity.

 

So you probably want to know: Are you affected?

 

These "residential proxy networks" have plenty of uses -- some legitimate, many illegal.

 

Some devices ship with residential proxy software preinstalled -- this can happen with certain low-cost video-streaming systems -- and sometimes people download the code unwittingly to their smartphones.

 

Such software can give anyone -- even hackers -- a back door into your home network. And if they use your network for illegal activity, there's a chance that law enforcement could come knocking at your door.

 

Fortunately, you can check quickly. Unfortunately, if your network doesn't get a clean bill of health, it's a bigger challenge to find out what's wrong.

 

The internet intelligence company Spur [1] investigates residential proxy networks and keeps a list of all of their known internet locations, aka nodes. Spur built a quick-test page ( https://spur.us/me ) that looks at your home network's IP address -- the internet's version of a phone number. (If you're on a virtual private network or on Apple's iCloud Private Relay, you'll have to turn that off to run this test.)

 

I clicked the page above to check on my IP address at home, and the page reported "Observed Risks: unknown." As ominous as that sounds, Spur co-founder Riley Kilmer says that means I'm proxy-free.

 

If you're on a network that is infected, the page will list at least one "observed risk," and also some "top client proxies," or residential proxy networks.

 

Here's the tricky thing: The test could still show "observed risks" if you aren't personally infected. If you're on a mobile cellular network, for instance, someone sharing your IP address might be infected. So if anything appears in that "observed risk" box, it means you need extra precautions, says Kilmer.

 

Here are a few basic internet hygiene steps you can take:

 

First off, if you have downloaded an app that pays you for sharing your internet bandwidth, you are likely part of a residential proxy network. And that might be completely above board, as long as you're aware of it.

 

Shadier operators sneak residential proxy nodes into apps. Free apps that offer VPNs are often a big culprit, Kilmer says. Another red flag: "free" versions of videogames you would normally pay for, or streaming-video apps offering you free access to paid content.

 

Residential proxy software has been spotted on cheap, off-brand video-streaming gadgets, too. Experts say if you have bought a device that lets you stream sports or paid content free of charge, there's a good chance it's infected. Cheap digital picture frames from unrecognizable brands are also suspect.

 

If you're worried, upgrade your hardware. Buy a picture frame from a reputable brand, and take the plunge on a video-streaming subscription or two. And check the test page again after you clean up your tech: If you were the only party infected on your IP address, your network should get the all-clear within two weeks.

 

Kilmer reminds us of the internet's cardinal rule: "If it sounds too good to be true, it likely is."” [2]

 

1. There are free, open-source, or limited-tier alternatives to Spur's IP intelligence and device verification, often used in OSINT (Open Source Intelligence). Free alternatives include tools that analyze IP data, check for proxy/VPN usage, and query reputation databases, such as

AbuseIPDB, IP2Location (free API tier), and various free IP geolocation APIs.

 

Free Alternatives to Spur.us

 

    AbuseIPDB: Allows checking if an IP is listed as a proxy, VPN, or malicious actor.

    IP2Location Free Database: Offers free IP geolocation and proxy detection data.

    IP-API: Provides free geolocation services with proxy/VPN detection for, in some cases, limited requests.

    Tor Browser: While not an analyzer, it can help bypass restrictions by providing a fresh identity.

 

These tools help identify residential proxies, a core function of Spur.us intelligence.

 

2. How to Protect Yourself Against Botnets --- Malware in apps, devices can be a back door into your home network. McMillan, Robert.  Wall Street Journal, Eastern edition; New York, N.Y.. 04 Apr 2026: A9.