Tag: Android

Free apps are supposed to cost you nothing but storage space. But in this case, they may have cost millions of people control over their own internet connections.

Google says it has disrupted what it believes was the world’s largest residential proxy network, one that secretly hijacked around 9 million Android devices, along with computers and smart home gadgets. Most people had no idea their devices were being used since the apps worked normally, and nothing looked broken.

But behind the scenes, those devices were quietly routing traffic for strangers, including cybercriminals.

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STOP GOOGLE FROM FOLLOWING YOUR EVERY MOVE
 

How your device became part of a proxy network

According to Google’s Threat Intelligence Group, the network was tied to a company known as IPIDEA. Instead of spreading through obvious malware, it relied on hidden software development kits, or SDKs, that were embedded inside more than 600 apps. These apps ranged from simple utilities to VPN tools and other free downloads. When you installed one, the app performed its advertised function. But it also enrolled your device into a residential proxy network.

That means your phone, computer or smart device could be used as a relay point for someone else’s internet traffic. That traffic might include scraping websites, launching automated login attempts or masking the identity of someone conducting shady online activity. From the outside, it looked like that activity came from your home IP address. You wouldn’t see it happening, and in many cases, you wouldn’t notice any major performance issues.

Google says in a single seven-day period earlier this year, more than 550 separate threat groups were observed using IP addresses linked to this infrastructure. That includes cybercrime operations and state-linked actors. Residential proxy networks are attractive because they make malicious traffic look like normal consumer activity. Instead of coming from a suspicious data center, it appears to come from someone’s living room.

What Google did to shut it down

Google says it took legal action in a U.S. federal court to seize domains used to control the infected devices and route proxy traffic. It also worked with companies like Cloudflare and other security firms to disrupt the network’s command-and-control systems. Google claims it also updated Play Protect, the built-in Android security system, so that certified devices would automatically detect and remove apps known to include the malicious SDKs.

However, Google also warned that many of these apps were distributed outside the official Play Store. That matters because Play Protect can only scan and block threats tied to apps installed through Google Play. Third-party app stores, unofficial downloads and uncertified Android devices carry far greater risk.

IPIDEA has claimed its service was meant for legitimate business use, such as web research and data collection. But Google’s research suggests the network was heavily abused by criminals. Even if some users knowingly installed bandwidth-sharing apps in exchange for rewards, many did not receive clear disclosure about how their devices were being used.

Google’s investigation also found significant overlap between different proxy brands and SDK names. What looked like separate services were often tied to the same infrastructure. That makes it harder for consumers to know which apps are safe and which are quietly monetizing their connection.

300,000 CHROME USERS HIT BY FAKE AI EXTENSIONS
 

Hidden software inside more than 600 apps allegedly turned phones and computers into internet relays for cybercriminals. (David Paul Morris/Bloomberg via Getty Images)

7 ways you can protect yourself from Android proxy attacks

If millions of devices can be quietly turned into internet relay points, the big question is, how do you make sure yours isn’t one of them? These steps reduce the risk that your phone, TV box or smart device gets pulled into a proxy network without you realizing it.

1) Stick to official app stores

Only download apps from the Google Play Store or other trusted app marketplaces. Some apps hide small pieces of code that can secretly use your internet connection. These are often spread through third-party app stores or direct app files called “APKs,” which are Android app files installed manually instead of through the Play Store. When you sideload apps this way, you bypass Google’s built-in security checks. Sticking to official stores helps keep those hidden threats off your device.

2) Avoid “earn money by sharing bandwidth” apps

If an app promises rewards for sharing your unused internet bandwidth, that’s a major red flag. In many cases, that is exactly how residential proxy networks recruit devices. Even if it sounds legitimate, you are effectively renting out your IP address. That can expose you to abuse, blacklisting or deeper network vulnerabilities.

3) Review app permissions carefully

Before installing any app, check what permissions it requests. A simple wallpaper app should not need full network control or background execution privileges. After installation, go into your phone’s settings and audit which apps have constant internet access, background activity rights or special device permissions.

4) Install strong antivirus software

Today’s mobile security tools can detect suspicious app behavior, unusual internet activity and hidden background services. Strong antivirus software adds an extra layer of protection beyond what’s built into your device, especially if you’ve installed apps in the past that you’re unsure about. Get my picks for the best 2026 antivirus protection winners for your Windows, Mac, Android and iOS devices at Cyberguy.com.

5) Keep your devices updated

Android security updates patch vulnerabilities that proxy operators may exploit. If you’re using an older phone, tablet or Android TV box that no longer receives updates, it may be time to upgrade. Unpatched devices are easier targets for hidden SDK abuse and botnet enrollment.

6) Use a strong password manager

If your device ever becomes part of a proxy network or is otherwise compromised, attackers often try to pivot into your accounts next. That’s why you should never reuse passwords. A password manager generates long, unique passwords for every account and stores them securely, so one breach does not unlock your email, banking or social media. Many password managers also include breach monitoring tools that alert you if your credentials appear in leaked databases, giving you a chance to act before real damage is done. Check out the best expert-reviewed password managers of 2026 at Cyberguy.com.

7) Remove apps you don’t fully trust

Go through your installed apps and delete or uninstall anything you don’t recognize or haven’t used in months. The fewer apps running on your device, the fewer opportunities there are for hidden SDKs to operate. If you suspect your device has been compromised, consider a full reset and reinstall only essential apps from trusted sources.

ANDROID MALWARE HIDDEN IN FAKE ANTIVIRUS APP

Threat groups and state-linked actors allegedly used compromised devices to mask online activity and automate attacks. (Photo Illustration by Serene Lee/SOPA Images/LightRocket via Getty Images)

Kurt’s key takeaway

Residential proxy networks operate in a gray area that sounds harmless on paper but can quickly become a shield for cybercrime. In this case, millions of everyday devices were quietly enrolled into a system that attackers used to hide their tracks. Google’s takedown is a major move, but the broader market for residential proxies is still growing. That means you need to be cautious about what you install and what permissions you grant. Free apps are rarely truly free. Sometimes, the product being sold is you and your internet connection.

Have you ever installed an app that promised rewards for sharing bandwidth, or used a free VPN without thinking twice about it? Let us know your thoughts by writing to us at Cyberguy.com.

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Related Article

If you use an Android phone, this deserves your attention. 

Cybersecurity researchers warn that hackers are using Hugging Face, a popular platform for sharing artificial intelligence (AI) tools, to spread dangerous Android malware. 

At first, the threat appears harmless because it is disguised as a fake antivirus app. Then, once you install it, criminals gain direct access to your device. Because of this, the threat stands out as especially troubling. It combines two things people already trust — security apps and AI platforms.

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MALICIOUS GOOGLE CHROME EXTENSIONS HIJACK ACCOUNTS

What Hugging Face is and why it matters

For anyone unfamiliar, Hugging Face is an open platform where developers share AI, NLP and machine learning models. It is widely used by researchers and startups and has become a central hub for AI experimentation. That openness is also what attackers exploited. Because Hugging Face allows public repositories and supports many file types, criminals were able to host malicious code in plain sight.

The fake antivirus app behind the attack

The malware first appeared in an Android app called TrustBastion. On the surface, it looks like a helpful security tool. It promises virus protection, phishing defense and malware blocking. In reality, it does the opposite. 

Once installed, TrustBastion immediately claims your phone is infected. It then pressures you to install an update. That update delivers the malicious code. This tactic is known as scareware. It relies on panic and urgency to push users into tapping before thinking.

FAKE ERROR POPUPS ARE SPREADING MALWARE FAST

The fake TrustBastion app mimics a legitimate Google Play update screen to trick users into installing malware.  (Bitdefender)

How the malware spreads and adapts

According to Bitdefender, a global cybersecurity company, the campaign centers on a fake Android security app called TrustBastion. Victims were likely shown ads or warnings claiming their device was infected and were instructed to manually install the app.

The attackers hosted TrustBastion’s APK files directly on Hugging Face, placing them inside public datasets that appeared legitimate at first glance. Once installed, the app immediately prompted users to install a required “update,” which delivered the actual malware.

After researchers reported the malicious repository, it was taken down. However, Bitdefender observed that nearly identical repositories quickly reappeared, with small cosmetic changes but the same malicious behavior. That rapid re-creation made the campaign harder to fully shut down.

What this Android malware can actually do

This Trojan is not minor or annoying. It is invasive. Bitdefender says the malware can:

Take screenshots of your device

Show fake login screens for financial services

Capture your lock screen PIN

Once collected, that data is sent to a third-party server. From there, attackers can move quickly to drain accounts or lock you out of your own phone.

What Google says about the threat

Google says users who stick to official app stores are protected. A Google spokesperson told CyberGuy, “Based on our current detection, no apps containing this malware are found on Google Play.

“Android users are automatically protected against known versions of this malware by Google Play Protect, which is on by default on Android devices with Google Play Services.

“Google Play Protect can warn users or block apps known to exhibit malicious behavior, even when those apps come from sources outside of Play.”

BROWSER EXTENSION MALWARE INFECTED 8.8M USERS IN DARKSPECTRE ATTACK

Once installed, the malware could capture screenshots, fake login details and even your lock screen PIN. (Kurt “CyberGuy” Knutsson)

How to stay safe from Hugging Face Android malware

This threat is a reminder that small choices matter. Here is what you should do right now:

1) Stick to trusted app stores

Only download apps from reputable sources like Google Play Store or the Samsung Galaxy Store. These platforms have moderation and scanning in place.

2) Read reviews before installing

Look closely at ratings, download counts and recent comments. Fake security apps often have vague reviews or sudden rating spikes.

3) Use a data removal service

Even careful users can have personal data exposed. A data removal service helps remove your phone number, email and other details from data broker sites that criminals rely on. That reduces follow-up scams, fake security alerts and account takeover attempts.

While no service can guarantee the complete removal of your data from the internet, a data removal service is really a smart choice. They aren’t cheap, and neither is your privacy. 

These services do all the work for you by actively monitoring and systematically erasing your personal information from hundreds of websites. It’s what gives me peace of mind and has proven to be the most effective way to erase your personal data from the internet. By limiting the information available, you reduce the risk of scammers cross-referencing data from breaches with information they might find on the dark web, making it harder for them to target you.

Check out my top picks for data removal services and get a free scan to find out if your personal information is already out on the web by visiting Cyberguy.com

Get a free scan to find out if your personal information is already out on the web: Cyberguy.com

4) Run Play Protect and use strong antivirus software

Scan your device regularly with Play Protect and back it up with strong antivirus software for added protection. Google Play Protect, which is built-in malware protection for Android devices, automatically removes known malware. However, it is important to note that Google Play Protect may not be enough. Historically, it hasn’t been 100% effective at removing all known malware from Android devices.

The best way to protect yourself against malicious links that install malware and potentially access your private information is to have strong antivirus software installed on all your devices. This protection can also help you detect phishing emails and ransomware, keeping your personal information and digital assets safe.

Get my picks for the best 2026 antivirus protection winners for your Windows, Mac, Android and iOS devices at Cyberguy.com

5) Avoid sideloading APK files

Avoid installing apps from websites outside the app store. These apps bypass security checks, so always verify the publisher name and URL.

6) Lock down your Google account

Your phone security depends on it. Enable two-step verification (2FA) first, then use a strong, unique password stored in a password manager to prevent account takeovers.

Next, see if your email has been exposed in past breaches. Our No. 1 password manager (see Cyberguy.com) pick includes a built-in breach scanner that checks whether your email address or passwords have appeared in known leaks. If you discover a match, immediately change any reused passwords and secure those accounts with new, unique credentials.

Check out the best expert-reviewed password managers of 2026 at Cyberguy.com

7) Be cautious with permissions

Be cautious with accessibility permissions. Malware often abuses them to take control of your device.

8) Watch app updates closely

Malware can hide inside fake updates. Be cautious of urgent fixes that push you outside the app store.

Kurt’s key takeaways

This attack shows how quickly trust can be weaponized. A platform designed to advance AI research was repurposed as a delivery system for malware. A fake antivirus app became the threat it claimed to stop. Staying safe no longer means avoiding sketchy-looking apps. It means questioning even those apps that appear helpful and professional.

Have you seen something on your phone that made you question its security? Let us know your thoughts by writing to us at Cyberguy.com

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Sign up for my FREE CyberGuy Report 

Get my best tech tips, urgent security alerts and exclusive deals delivered straight to your inbox. Plus, you’ll get instant access to my Ultimate Scam Survival Guide — free when you join my CYBERGUY.COM newsletter. 

Copyright 2026 CyberGuy.com.  All rights reserved.