Technology

What exactly is a data breach and why should I care?

Published

2 years ago

July 24, 2024

What exactly is a data breach and why should I care?

Data breaches have become common, and if you’ve actively used online services in the past year, you might have been affected by them. For example, the Advance Auto Parts breach exposed more than 2.3 million users’ personal information, while a recent AT&T incident allowed hackers to access around six months of customer call and text interactions. But what do bad actors do with all this data?

John from Jackson, Mississippi, asked a similar question that I want to highlight and address because it helps all of us:

“What do you mean when you say a company has exposed 2.3 million or whatever in a data breach? This happens often, but there is never any follow-up. It’s like throwing address labels in a trash can, and then they are carried to the landfill. So? What really happens with a data breach?”

I get what you’re saying, John. Data breaches make headlines, but you rarely hear about the fallout. It’s tough to link a specific breach to a specific problem later on. Below is a detailed look at what a data breach actually means.

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Illustration of a hacker at work (Kurt “CyberGuy” Knutsson)

Data breach explained

A data breach occurs when an unauthorized person gains access to information that is meant to be confidential, private, protected or sensitive. Think of it this way: You have personal information that you trusted a friend with, but while sharing it, someone who wasn’t supposed to know it overheard it.

A real-life example is the AT&T data breach mentioned earlier. Your call logs and text interactions that were meant to be private and which you trusted AT&T to protect ended up in the hands of hackers. These details can now be used by bad actors to scam you.

Data breaches can happen in a few ways. Hackers might target specific organizations or launch broad attacks hoping to steal certain kinds of data. They can also use targeted cyberattacks to go after specific individuals.

Sometimes, data breaches occur due to honest mistakes or oversights by employees. Weaknesses in an organization’s systems and infrastructure can also leave them vulnerable to data breaches.

Illustration of a hacker at work (Kurt “CyberGuy” Knutsson)

MASSIVE DATA BREACH EXPOSES 3 MILLION AMERICANS’ PERSONAL INFORMATION TO CYBERCRIMINALS

Anatomy of a deliberate data breach

Here’s what typically happens in a data breach that’s deliberately caused:

Research: Cybercriminals often begin by identifying a target, such as a large corporation like AT&T, focusing on the type of data they want, which could include personal customer information. They search for weaknesses in the company’s security, which might involve exploiting system flaws or targeting network infrastructure.

Attack: The attackers make their initial move using either a network or social attack. Common methods include phishing attacks, where individuals are tricked into revealing personal information; malware attacks that can steal or encrypt data; and denial-of-service attacks that disrupt services. These tactics can compromise the personal information of customers, such as names, addresses, phone numbers and even payment information.

Exfiltration: Once inside the company’s systems, cybercriminals tunnel their way to confidential data. For individuals, this means that their personal information can be extracted and sold on the dark web, used for identity theft or for other malicious purposes. The impact on individuals can be severe, including financial loss, damage to credit scores and the emotional stress of having personal information exposed and misused.

Illustration of a hacker at work (Kurt “CyberGuy” Knutsson)

WORLD’S LARGEST STOLEN PASSWORD DATABASE UPLOADED TO CRIMINAL FORUM

What happens once the hackers have the data?

Once the hackers obtain protected and confidential data, they have various ways to profit from it. They can use compromised data for illegal activities, including identity theft, financial fraud, spamming or even extortion. Information such as email addresses and phone numbers can be used in phishing scams.

Sometimes, this data is also posted on dark web forums for sale. It can be purchased by other criminals, who may use it for various illicit activities. Just as you don’t hear about every burglary, homicide or battery, you don’t hear about each instance of these criminal activities.

They only make headlines when something significant occurs, such as the incident where hackers scammed a Colorado woman out of $25,000 or when a man was arrested for scamming a Kalispell, Montana, woman of $150,000.

Data breaches impact not only customers but also the companies involved. These companies may face government fines or lawsuits. For example, AT&T is currently dealing with a class-action lawsuit due to a security breach in 2022 that exposed months’ worth of data from nearly all its customers. Similarly, T-Mobile is facing a lawsuit related to a data breach that affected millions of people.

Illustration of a hacker at work (Kurt “CyberGuy” Knutsson)

CYBERCRIMINALS TAKING ADVANTAGE OF CROWDSTRIKE-LINKED GLOBAL COMPUTER OUTAGE

How to protect yourself from data breaches?

It’s primarily the responsibility of companies or online services to keep your data safe, but if it gets exposed, here are some tips to keep in mind:

1. Change your passwords

If hackers have recorded your passwords, they could access your online accounts and steal your data or money. ON ANOTHER DEVICE (i.e., your laptop or desktop), you should change your passwords for all your important accounts, such as email, banking, social media, etc. You want to do this on another device so that the hacker isn’t recording you setting up your new password on your hacked device. And you should also use strong and unique passwords that are hard to guess or crack. You can also use a password manager to generate and store your passwords securely.

2. Enable two-factor authentication

Activate two-factor authentication (2FA) for an extra layer of security on all your important accounts, including email, banking and social media. 2FA requires you to provide a second piece of information, such as a code sent to your phone, in addition to your password when logging in. This makes it significantly harder for hackers to access your accounts, even if they have your password. Enabling 2FA can greatly reduce the risk of unauthorized access and protect your sensitive data.

3. Monitor your accounts and transactions

You should check your online accounts and transactions regularly for any suspicious or unauthorized activity. If you notice anything unusual, immediately report it to the service provider or authorities. You should also review your credit reports and scores to see if there are any signs of identity theft or fraud.

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4. Contact your bank and credit card companies

If hackers have obtained your bank or credit card information, they could use it to make purchases or withdrawals without your consent. You should inform your bank and credit card companies of the situation. They can help you freeze or cancel your cards, dispute any fraudulent charges and issue new cards for you.

You should also contact one of the three major credit reporting agencies (Equifax, Experian or TransUnion) and request a fraud alert to be placed on your credit file. This will make it more difficult for identity thieves to open new accounts in your name without verification. You can even freeze your credit, if need be.

5. Use personal data removal services

Consider investing in personal data removal services that specialize in continuously monitoring and removing your personal information from various online databases and websites. These services employ advanced tools and techniques to identify and eliminate your data from people-search sites, data brokers and other platforms where your information might be exposed. By using a data removal service, you can minimize the risk of identity theft and fraud, especially after a data breach. Additionally, these services often provide ongoing monitoring and alerts, keeping you informed of any new instances of your data appearing online and taking immediate action to remove it. Check out my top picks for data removal services here.

6. Sign up for identity theft protection

Identity theft protection companies can monitor personal information like your home title, Social Security Number, phone number and email address and alert you if it is being used to open an account. They can also assist you in freezing your bank and credit card accounts to prevent further unauthorized use by criminals. See my tips and best picks on how to protect yourself from identity theft.

7. Alert your contacts

If hackers have accessed your email or social media accounts, they could use them to send spam or phishing messages to your contacts. They could also impersonate you and ask for money or personal information. You should alert your contacts and warn them not to open or respond to any messages from you that seem suspicious or unusual.

Kurt’s key takeaway

The impact of a data breach may not be immediate, but once your data is on the internet, it can be misused by bad actors. They can steal your hard-earned money, cause emotional and mental harm or affect your loved ones. So, even if you don’t see the immediate impact of a data breach, take action. Ensure your devices are protected, and keep a close eye on your bank accounts.

Have you ever noticed unusual activity in your accounts after a data breach was reported? Let us know by writing us at Cyberguy.com/Contact.

For more of my tech tips and security alerts, subscribe to my free CyberGuy Report Newsletter by heading to Cyberguy.com/Newsletter.

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Kurt “CyberGuy” Knutsson is an award-winning tech journalist who has a deep love of technology, gear and gadgets that make life better with his contributions for Fox News & FOX Business beginning mornings on “FOX & Friends.” Got a tech question? Get Kurt’s free CyberGuy Newsletter, share your voice, a story idea or comment at CyberGuy.com.

Technology

Here’s your first look at Kratos in Amazon’s God of War show

Published

9 hours ago

February 27, 2026

Press Room

Here’s your first look at Kratos in Amazon’s God of War show

Amazon has slowly been teasing out casting details for its live-action adaptation of God of War, and now we have our first look at the show. It’s a single image but a notable one showing protagonist Kratos and his son Atreus. The characters are played by Ryan Hurst and Callum Vinson, respectively, and they look relatively close to their video game counterparts.

There aren’t a lot of other details about the show just yet, but this is Amazon’s official description:

The God of War series storyline follows father and son Kratos and Atreus as they embark on a journey to spread the ashes of their wife and mother, Faye. Through their adventures, Kratos tries to teach his son to be a better god, while Atreus tries to teach his father how to be a better human.

That sounds a lot like the recent soft reboot of the franchise, which started with 2018’s God of War and continued through Ragnarök in 2022. For the Amazon series, Ronald D. Moore, best-known for his work on For All Mankind and Battlestar Galactica, will serve as showrunner. The rest of the cast includes: Mandy Patinkin (Odin), Ed Skrein (Baldur), Max Parker (Heimdall), Ólafur Darri Ólafsson (Thor), Teresa Palmer (Sif), Alastair Duncan (Mimir), Jeff Gulka (Sindri), and Danny Woodburn (Brok).

While production is underway on the God of War series, there’s no word on when it might start streaming.

Technology

300,000 Chrome users hit by fake AI extensions

Published

9 hours ago

February 27, 2026

Press Room

300,000 Chrome users hit by fake AI extensions

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Your web browser may feel like a safe place, especially when you install helpful tools that promise to make your life easier. But security researchers have uncovered a dangerous campaign in which more than 300,000 people installed Chrome extensions pretending to be artificial intelligence (AI) assistants. Instead of helping, these fake tools secretly collect sensitive information like your emails, passwords and browsing activity.

They used familiar names like ChatGPT, Gemini and AI Assistant. If you use Chrome and have installed any AI-related extension, your personal information may already be exposed. Even worse, some of these malicious extensions are still available today, putting more people at risk without their knowing.

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More than 300,000 Chrome users installed fake AI extensions that secretly harvested sensitive data. (Kurt “CyberGuy” Knutsson)

What you need to know about fake AI extensions

Security researchers at browser security company LayerX discovered a large campaign involving 30 malicious Chrome extensions disguised as AI-powered assistants (via BleepingComputer). Together, these extensions were installed more than 300,000 times by unsuspecting users.

Some of the most popular extensions included names like AI Sidebar with 70,000 users, AI Assistant with 60,000 users, ChatGPT Translate with 30,000 users, and Google Gemini with 10,000 users. Another extension called Gemini AI Sidebar had 80,000 users before it was removed.

These extensions were distributed through the official Chrome Web Store, which made them appear legitimate and trustworthy. Even more concerning, researchers found that many of these extensions were connected to the same malicious server, showing they were part of a coordinated effort.

While some extensions have since been removed, others remain available. This means new users could still unknowingly install them and expose their personal data. Here’s the list of the affected extensions:

AI Assistant
Llama
Gemini AI Sidebar
AI Sidebar
ChatGPT Sidebar
Grok
Asking ChatGPT
ChatGBT
Chat Bot GPT
Grok Chatbot
Chat With Gemini
XAI
Google Gemini
Ask Gemini
AI Letter Generator
AI Message Generator
AI Translator
AI For Translation
AI Cover Letter Generator
AI Image Generator ChatGPT
Ai Wallpaper Generator
Ai Picture Generator
DeepSeek Download
AI Email Writer
Email Generator AI
DeepSeek Chat
ChatGPT Picture Generator
ChatGPT Translate
AI GPT
ChatGPT Translation
ChatGPT for Gmail

FAKE AI CHAT RESULTS ARE SPREADING DANGEROUS MAC MALWARE

These malicious tools were listed in the official Chrome Web Store, making them appear legitimate and trustworthy. (LayerX)

How the fake AI Chrome extension attack works

These fake extensions pretend to offer helpful AI features, such as translating text, summarizing emails, or acting as an AI assistant. But behind the scenes, they quietly monitor what you are doing online.

Once installed, the extension gains permission to view and interact with the websites you visit. This allows it to read the contents of web pages, including login screens where you enter your username and password.

In some cases, the extensions specifically targeted Gmail. They could read your email messages directly from your browser, including emails you received and even drafts you were still writing. This means attackers could access private conversations, financial information and sensitive personal details.

The extensions then sent this information to servers controlled by the attackers. Because they loaded content remotely, the attackers could change their behavior at any time without needing to update the extension.

Some versions could also activate voice features through your browser. This could potentially capture spoken conversations near your device and send transcripts back to the attackers.

If you installed one of these extensions, attackers may already have access to extremely sensitive information. This includes your email content, login credentials, browsing habits and possibly even voice recordings.

We reached out to Google for comment, and a spokesperson told CyberGuy that the company “can confirm that the extensions from this report have all been removed from the Google Web Store.”

BROWSER EXTENSION MALWARE INFECTED 8.8M USERS IN DARKSPECTRE ATTACK

Once installed, the extensions could read emails, capture passwords, monitor browsing activity and send the data to attacker-controlled servers. (Bildquelle/ullstein bild via Getty Images)

7 ways you can protect yourself from malicious Chrome extensions

If you have ever installed an AI-related Chrome extension, taking a few simple precautions now can help protect your accounts and prevent further damage.

1) Remove any suspicious or unused browser extensions

On a Windows PC or Mac, open Chrome and type chrome://extensions into the address bar. Review every extension listed. If you see anything unfamiliar, especially AI assistants you don’t remember installing, click “Remove” immediately. Malicious extensions depend on going unnoticed. Removing them stops further data collection and cuts off the attacker’s access to your information.

2) Change your passwords

If you installed any suspicious extension, assume your passwords may be compromised. Start by changing your email password first, since email controls access to most other accounts. Then update passwords for banking, shopping and social media accounts. This prevents attackers from using stolen credentials to break into your accounts.

3) Use a password manager to create and protect strong passwords

A password manager generates unique, complex passwords for each account and stores them securely. This prevents attackers from accessing multiple accounts if one password is stolen. Password managers also alert you if your login credentials appear in known data breaches, helping you respond quickly and protect your identity. Check out the best expert-reviewed password managers of 2026 at Cyberguy.com.

4) Install strong antivirus software and keep it active

Good antivirus software can detect malicious browser extensions, spyware, and other hidden threats. It scans your system for suspicious activity and blocks harmful programs before they can steal your information. This adds an important layer of protection that works continuously in the background to keep your device safe. Get my picks for the best 2026 antivirus protection winners for your Windows, Mac, Android & iOS devices at Cyberguy.com.

5) Use an identity theft protection service

Identity theft protection services monitor your personal data, including email addresses, financial accounts, and Social Security numbers, for signs of misuse. If criminals try to open accounts or commit fraud using your information, you receive alerts quickly. Early detection allows you to act fast and limit financial and personal damage. See my tips and best picks on how to protect yourself from identity theft at Cyberguy.com.

6) Keep your browser and computer fully updated

Software updates fix security vulnerabilities that attackers exploit. Enable automatic updates for Chrome and your operating system so you always have the latest protections. These updates strengthen your defenses against malicious extensions and prevent attackers from taking advantage of known weaknesses.

7) Use a personal data removal service

Personal data removal services scan data broker websites that collect and sell your personal information. They help remove your data from these sites, reducing what attackers can find and use against you. Less exposed information means fewer opportunities for criminals to target you with scams, identity theft or phishing attacks.

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.

Kurt’s key takeaway

Even tools designed to make your life easier can become tools for cybercriminals. Malicious extensions often hide behind trusted names and convincing features, making them difficult to spot. You can significantly reduce your risk by reviewing your browser extensions regularly, removing anything suspicious and using protective tools like password managers and strong antivirus software.

Have you checked your browser extensions recently? Let us know your thoughts by writing to us at Cyberguy.com.

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Technology

Anthropic refuses Pentagon’s new terms, standing firm on lethal autonomous weapons and mass surveillance

Published

21 hours ago

February 26, 2026

Press Room

Anthropic refuses Pentagon’s new terms, standing firm on lethal autonomous weapons and mass surveillance

Less than 24 hours before the deadline in an ultimatum issued by the Pentagon, Anthropic has refused the Department of Defense’s demands for unrestricted access to its AI.

It’s the culmination of a dramatic exchange of public statements, social media posts, and behind-the-scenes negotiations, coming down to Defense Secretary Pete Hegseth’s desire to renegotiate all AI labs’ current contracts with the military. But Anthropic, so far, has refused to back down from its two current red lines: no mass surveillance of Americans, and no lethal autonomous weapons (or weapons with license to kill targets with no human oversight whatsoever). OpenAI and xAI had reportedly already agreed to the new terms, while Anthropic’s refusal had led to CEO Dario Amodei being summoned to the White House this week for a meeting with Hegseth himself, in which the Secretary reportedly issued an ultimatum to the CEO to back down by the end of business day on Friday or else.

In a statement late Thursday, Amodei wrote, “I believe deeply in the existential importance of using AI to defend the United States and other democracies, and to defeat our autocratic adversaries. Anthropic has therefore worked proactively to deploy our models to the Department of War and the intelligence community.”

He added that the company has “never raised objections to particular military operations nor attempted to limit use of our technology in an ad hoc manner” but that in a “narrow set of cases, we believe AI can undermine, rather than defend, democratic values” — going on to specifically mention mass domestic surveillance and fully autonomous weapons. (Amodei mentioned that “partial autonomous weapons … are vital to the defense of democracy” and that fully autonomous weapons may eventually “prove critical for our national defense,” but that “today, frontier AI systems are simply not reliable enough to power fully autonomous weapons.” He did not rule out Anthropic acquiescing to the military’s use of fully autonomous weapons in the future but mentioned that they were not ready now.)

The Pentagon had already reportedly asked major defense contractors to assess their dependence on Anthropic’s Claude, which could be seen as the first step to designating the company a “supply chain risk” – a public threat that the Pentagon had made recently (and a classification usually reserved for threats to national security). The Pentagon was also reportedly considering invoking the Defense Production Act to make Anthropic comply.

Amodei wrote in his statement that the Pentagon’s “threats do not change our position: we cannot in good conscience accede to their request.” He also wrote that “should the Department choose to offboard Anthropic, we will work to enable a smooth transition to another provider, avoiding any disruption to ongoing military planning, operations, or other critical missions. Our models will be available on the expansive terms we have proposed for as long as required.”