Technology
Homeland Security warns federal agencies of hackers targeting Google Chrome, Excel spreadsheets
The Cybersecurity and Infrastructure Security Agency, or CISA, is issuing a new warning: your Google Chrome browser and Excel spreadsheets could be at risk of an attack. The agency identified two new exploits that could give hackers easy access to your computer.
Federal agencies have until January 23 to make sure they’re protected. Here are some ways to make sure you’re protected too.
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Microsoft logo on keyboard (Kurt “CyberGuy” Knutsson)
Microsoft Excel’s new exploit
Hackers are targeting Microsoft Excel using a huge vulnerability in a library that reads Excel files. The bug is in a library called Spreadsheet::ParseExcel. It allows hackers to run malware remotely. Specifically, hackers can utilize a string in the library to run programs on your computer.
This exploit has popped up before. Security firm Barracuda noticed Chinese hackers using the exploit last month. They would create custom Excel attachments to exploit the bug and run any program they wanted to.
While Barracuda addressed this with a patch, they say open-source libraries could still be at risk. The company also issued a warning to anyone who uses Spreadsheet::ParseExcel, recommending they review the bug and take any necessary action.
Google Chrome browser on laptop (Kurt “CyberGuy” Knutsson)
MORE: THE 7 SIGNS YOU’VE BEEN HACKED
Google Chrome’s bug
Google’s eighth day zero attack comes in the form of an attack on an open-source project. WebRTC allows web browsers and mobile applications to communicate in real-time. However, hackers are using it to overload your browser and either cause it to crash or give them permission to do whatever they want. This exploit doesn’t just affect Google Chrome. It also affects other open-source web browsers using WebRTC to communicate. Google issued an emergency fix just last month, but there’s more you can do to protect yourself.
Four essential tips to secure your devices and data from hackers and scammers
To protect yourself from malicious hackers and scammers, we recommend you do the following four things.
1) Be cautious about using open-source applications
When you use open-source applications or programs, it’s always wise to remember that anyone has the ability to change the application or program’s code. They have the ability to do something malicious if they want to. Only use open-source applications that you trust, and be careful about what you download.
2) Update your applications regularly
One of the easiest ways to protect yourself from hackers and scammers is to keep your applications up to date. Hackers often exploit vulnerabilities in outdated software to gain access to your devices or data. By updating your applications regularly, you can patch these security holes and prevent hackers from exploiting them.
3) Avoid opening suspicious attachments or links
Another common way that hackers and scammers try to infect your devices or steal your information is by sending you malicious attachments or links. These can be disguised as legitimate emails, messages, or websites, but they can contain malware, phishing or ransomware. To avoid falling for these traps, you should always check the sender, the subject, and the content of any attachment or link before opening it. If you are not sure, do not open it or click on it.
4) Use antivirus protection
Antivirus protection is essential for keeping your computer and data safe from malicious attacks. The recent exploits allow hackers to run malware remotely by sending custom Excel attachments and allow hackers to overload your browser and gain access to your system.
So, the best way to protect yourself is to have antivirus protection installed and actively running on all your devices. It will alert you of any malware in your system, warn you against clicking on any malicious links in phishing emails, and ultimately protect you from being hacked. Find my review of Best Antivirus Protection here.
The best way to protect yourself is to have antivirus protection installed and actively running on all your devices. (Kurt “CyberGuy” Knutsson)
MORE: THE NEW IPHONE SECURITY THREAT THAT ALLOWS HACKERS TO SPY ON YOUR PHONE
What to do if you’ve been hacked
If it has already happened and you’ve been hacked, then you should take immediate action to minimize the damage and secure your device. Here are some steps that you can follow:
Change your passwords
If hackers have recorded your passwords using a keylogger, 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 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.
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, report it to the service provider or the authorities as soon as possible. You should also review your credit reports and scores to see if there are any signs of identity theft or fraud.
Use identity theft protection
Identity Theft protection companies can monitor personal information like your home title, Social Security Number (SSN), 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.
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 contact your bank and credit card companies and inform them of the situation. They can help you freeze or cancel your cards, dispute any fraudulent charges, and issue new cards for you.
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.
Restore your device to factory settings
If you want to make sure that your device is completely free of any malware or spyware, you can restore it to factory settings. This will erase all your data and settings and reinstall the original iOS version. But, you should back up your important data before doing this, and only restore it from a trusted source.
MORE: GOT A CREDIT CARD FRAUD ALERT? HOW CROOKS SWIPE YOUR PAYMENT CARD DETAILS
Kurt’s key takeaways
The recent exploits targeting Google Chrome and Microsoft Excel are a reminder of how vulnerable our devices and data can be to cyberattacks. Hackers are always looking for new ways to exploit the software we use every day, and we need to be vigilant and proactive in protecting ourselves. By following the steps we outlined above, you can reduce the risk of falling victim to these attacks and keep your computer and data safe. Remember, prevention is better than cure, and the best defense is a good offense.
Which aspect of the cyberthreats discussed in the article concerns you the most, and why? Let us know by writing us at Cyberguy.com/Contact.
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Copyright 2024 CyberGuy.com. All rights reserved.
Technology
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
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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
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.”
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