Technology
Chaos ransomware hits Optima Tax Relief, leaks 69GB of data
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Cyberattacks on financial service providers are no longer isolated events. In recent years, tax preparation companies, accounting software vendors and data brokers have all found themselves in the crosshairs of increasingly aggressive ransomware gangs. These attacks don’t just disrupt operations but also expose deeply personal financial information that can fuel identity theft, fraud and long-term reputational damage.
Now, Optima Tax Relief, one of the most prominent tax resolution firms in the U.S., has joined that growing list. A ransomware group called Chaos claims to have breached Optima’s systems, stealing 69 GB of data before encrypting internal servers.
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A woman working on a laptop (Kurt “CyberGuy” Knutsson)
Customer case files and personal information exposed
The data stolen in the attack includes what appears to be corporate documents and sensitive customer case files. Tax documents are especially valuable to cybercriminals. They often contain Social Security numbers, home addresses, phone numbers and other identifiers that can be used to commit financial fraud or impersonation.
Sources familiar with the incident told BleepingComputer this was a double-extortion attack. That means Chaos not only stole the data but also encrypted Optima’s systems, presumably demanding a ransom in exchange for access and non-disclosure. The firm has not yet commented publicly on whether it plans to pay the ransom or notify affected individuals.
TESLA DOXXING ATTACKS WRONGLY TARGET NONOWNERS ACROSS AMERICA
The attackers listed Optima on their leak site earlier this week. While the full dataset has not been published, the leak already raises concerns over regulatory compliance and consumer protection, especially given the sensitive nature of the firm’s work.
Optima Tax Relief has not released an official statement regarding the breach. There has been no confirmation about whether law enforcement or federal agencies are involved in the investigation. If you’ve ever used its services, assume your data could be at risk.
We reached out to Optima Tax Relief for a comment but did not hear back before our deadline.
Optima Tax Relief entry on Chaos data leak site (BleepingComputer)
DOUBLECLICKJACKING HACK TURNS DOUBLE-CLICKS INTO ACCOUNT TAKEOVERS
A new ransomware group with high-value targets
Chaos ransomware first emerged in March 2025, when it claimed responsibility for five separate breaches. The group is not connected to the “Chaos ransomware builder,” a DIY toolkit that’s been in circulation since 2021. Instead, this version of Chaos is believed to be run by a coordinated team that is strategically targeting organizations with access to large amounts of personally identifiable information.
Optima is not the only high-profile victim. In May, Chaos claimed to have breached the Salvation Army, though the organization has not publicly confirmed the attack or responded to media inquiries.
A person scrolling on their smartphone (Kurt “CyberGuy” Knutsson)
MALWARE EXPOSES 3.9 BILLION PASSWORDS IN HUGE CYBERSECURITY THREAT
6 ways you can stay safe from Optima data breach
If your information was part of the Optima breach or any similar one, it’s worth taking a few steps to protect yourself.
1. Consider identity theft protection services: Since the Optima data breach exposed personal and financial information, it’s crucial to stay proactive against identity theft. Identity theft protection services offer continuous monitoring of your credit reports, Social Security number and even the dark web to detect if your information is being misused. See my tips and best picks on how to protect yourself from identity theft.
2. Monitor your accounts and transactions: The Optima data breach might have revealed bank details to attackers, which means they can misuse those details to steal your money. 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. To report identity theft, visit the FTC’s IdentityTheft.gov.
3. Contact your bank and credit card companies: Since Optima hackers might have obtained bank and 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.
4. Use personal data removal services: The data breach leaks loads of information about you, and all this could end up in the public domain, which essentially gives anyone an opportunity to scam you. One proactive step is to consider personal data removal services, which specialize in continuously monitoring and removing your information from various online databases and websites. Check out my top picks for data removal services here.
Get a free scan to find out if your personal information is already out on the web.
5. Have strong antivirus software: Optima hackers most likely have people’s email addresses and full names, which makes it easy for them to send you a phishing link that installs malware and steals all your data. These messages are socially engineered to catch them, and catching them is nearly impossible if you’re not careful. However, you’re not without defenses.
The best way to safeguard yourself from malicious links is to have antivirus software installed on all your devices. This protection can also alert you to phishing emails and ransomware scams, keeping your personal information and digital assets safe. Get my picks for the best 2025 antivirus protection winners for your Windows, Mac, Android and iOS devices.
6. Enable two-factor authentication: While passwords weren’t part of the data breach, you still need to enable two-factor authentication (2FA). It gives you an extra layer of security on all your important accounts, including email, banking and social media. Two-factor authentication 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.
Kurt’s key takeaway
The Optima breach is not an isolated event, but part of a larger failure to adapt to the sophistication of modern ransomware groups. When companies with access to tax and identity data are compromised, it’s not just an internal issue; it becomes a national one. For an industry built on trust, breaches like this erode public confidence in systems that are already strained. Attacks like these raise fresh concerns about the cybersecurity preparedness of companies that handle tax and financial data. Unlike login credentials or email addresses, stolen tax information cannot be easily reset. For victims, the consequences of such a breach could stretch across years.
Do you think finance companies are investing enough in their cybersecurity infrastructure? Let us know by writing to us at Cyberguy.com/Contact.
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Technology
SpaceX cuts a deal to maybe buy Cursor for $60 billion
SpaceX and Cursor are now working closely together to create the world’s best coding and knowledge work AI.
The combination of Cursor’s leading product and distribution to expert software engineers with SpaceX’s million H100 equivalent Colossus training supercomputer will allow us to build the world’s most useful models.
Cursor has also given SpaceX the right to acquire Cursor later this year for $60 billion or pay $10 billion for our work together.
Technology
Fake Windows update installs hidden malware
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If you’ve ever clicked “Check for updates” and trusted what you saw, you’re not alone. That’s exactly what this latest scam is counting on.
The page mimics official branding, includes a believable knowledge base number and presents a big blue download button that feels familiar.
The catch? The download installs malware designed to steal passwords, payment details and account access.
According to researchers at Malwarebytes Labs, a cybersecurity research and threat intelligence team inside Malwarebytes, the site uses a typosquatted domain that looks close enough to a real Microsoft URL to fool a quick glance. That small trick is often all it takes.
APPLE APP PASSWORD SCAM EMAIL WARNING
Cybersecurity researchers warn a fake Microsoft update site uses a look-alike URL and a familiar download button to deliver data-stealing malware. (Michael Nagle/Bloomberg via Getty Images)
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Why this fake Windows update malware slips past detection
At first glance, nothing seems off. The file looks like a standard Windows installer. It even lists “Microsoft” in its properties. That’s where this attack gets clever. Instead of using obvious malicious code, the attackers built the installer with legitimate tools and layered the attack in stages. Each piece looks harmless on its own.
Here’s what’s happening behind the scenes:
- The installer launches what appears to be a normal app
- That app quietly runs hidden scripts
- A disguised process loads a full Python environment
- Data theft tools activate in the background
Because each step looks routine, many security tools fail to flag it right away. Researchers also noted that antivirus engines initially showed zero detections for key parts of the attack. That does not mean the file is safe. It means the malicious behavior is well hidden.
What this fake Windows update malware is stealing
Once installed, the malware gets to work fast. It collects details about the infected device, including location and IP address. Then it reaches out to remote servers to receive instructions and upload stolen data.
The targets include:
- Saved browser passwords
- Login sessions and cookies
- Payment details
- Discord account tokens
It even tries to shut down other processes on your system to avoid interference while it works. In some cases, it modifies apps like Discord to intercept account activity in real time.
How the fake Windows update malware stays on your system
This malware is designed to stick around. It creates entries that look like normal system processes, so they blend in. One registry entry mimics Windows Security Health, which most users would ignore. It also drops a shortcut in your startup folder with a familiar name like Spotify. That makes it easy to overlook. Two different persistence tricks mean it can survive a reboot and keep running.
FAKE WINDOWS UPDATE PUSHES MALWARE IN NEW CLICKFIX ATTACK
A fake Windows update page is tricking users into downloading malware that steals passwords, payment details and account access. (Beata Zawrzel/NurPhoto)
Why this fake Windows update scam feels so real
There’s a bigger trend behind this. Researchers say campaigns like this often target regions where large data breaches have already exposed personal information. When attackers already know your name, provider or habits, they can build scams that feel tailored to you. That makes a fake Windows update page far more believable than a generic phishing email.
It also highlights something important. Today’s malware often hides inside legitimate tools and trusted frameworks. That makes it harder to detect and easier to trust. This campaign shows how far scammers have come. They are no longer relying on sloppy emails or obvious fake links. Instead, they are building layered attacks that look and behave like trusted software.
Even experienced users can get caught off guard when everything appears normal. The biggest takeaway is simple. A clean scan result or a familiar interface does not guarantee safety.
Microsoft says it’s aware of the threat
Microsoft confirmed it is tracking this type of activity and urges users to be cautious when downloading updates from unfamiliar sources.
“We are aware of reports of fraudulent websites impersonating Microsoft, and we actively work to detect and disrupt malicious activity across the internet,” A Microsoft spokesperson told CyberGuy. “We encourage customers to be cautious of unexpected prompts or downloads and to verify that they are interacting with legitimate Microsoft domains. As a best practice, we recommend users verify the legitimacy of a link by going directly to our website from your own saved favorite, from a web search, or by typing the domain name yourself.”
For more guidance on how to protect against online phishing scams, you can refer to Microsoft’s official support page at support.microsoft.com.
MICROSOFT CROSSES PRIVACY LINE FEW EXPECTED
A convincing Windows update scam is spreading malware that can grab saved passwords, cookies, payment data and Discord tokens. (Todor Tsvetkov/Getty Images)
Ways to stay safe from fake Windows update malware
You don’t need to be a security expert to avoid this. A few habits make a big difference.
1) Only update Windows from your settings
Go to Settings > Windows Update and check for updates there. Avoid downloading updates from websites.
2) Double-check the URL
Real Microsoft pages use microsoft.com. Anything else, even if it looks close, should raise a red flag.
3) Be cautious with urgent update prompts
If a site or message pressures you to install an update, stop and verify it manually.
4) Use strong antivirus software with behavior detection
Traditional antivirus software, which often comes built into your device or as basic security software, mainly looks for known threats using signature matching, which means it can miss new or well-hidden attacks like this one. Strong antivirus software uses behavior detection to monitor what programs are doing in real time, helping flag suspicious activity even if the malware hasn’t been seen before. Get my picks for the best 2026 antivirus protection winners for your Windows, Mac, Android & iOS devices at Cyberguy.com.
5) Use a data removal service to limit your exposure
If your personal information is already circulating online from past breaches, it can make scams like this more convincing. A data removal service helps reduce how much of your information is publicly available, making it harder for attackers to target you with tailored phishing attempts. 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
6) Turn on two-factor authentication
Two-factor authentication (2FA) adds a second layer of protection if your passwords are stolen.
7) Avoid downloading installer files from unknown sites
Legitimate updates rarely require manual downloads.
Kurt’s key takeaways
Fake updates are one of the most effective tricks because they tap into something we all trust. Keeping your system secure should not put you at risk, yet that’s exactly what attackers are exploiting here. The safest move is to slow down, verify where updates come from and stick to built-in tools whenever possible.
Are tech companies doing enough to keep fake updates from putting your data at risk? Let us know your thoughts in the comments below. Let us know by writing to us at Cyberguy.com.
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Copyright 2026 CyberGuy.com. All rights reserved.
Technology
The Vergecast Vergecast, 2026 edition
We get a lot of questions about how The Verge works. And how The Vergecast works. And how we make money. And whether some of that money helps Nilay buy more jackets, several yachts, or something else entirely. So, every once in a while, we spend an episode of the podcast answering as many questions as we can.
On this episode of The Vergecast, Nilay and David are joined by The Verge’s publisher, Helen Havlak, to talk about ads, subscriptions, our website, our audience, and more. Then, Nilay and David answer some more questions about how we think about journalism, our relationship with Verge alumni, video podcasts, and (of course) Brendan Carr.
Thanks to everyone who sent us questions for this episode, and please keep them coming! You can always call the Vergecast Hotline (866-VERGE11) or send us an email (vergecast@theverge.com) with your questions, thoughts, feelings, and misgivings about everything we’re up to. We truly love hearing from you. And if you want to be part of everything we’re up to, and help make The Verge even bigger and better, the best thing you can do is subscribe! You even get all our podcasts ad-free.
Oh, and also, in case you missed it yesterday, be sure and check out our emergency pod on the news that Tim Cook is stepping down as Apple CEO. We’ll be talking more about the future of Apple on Friday’s show, too, so send questions if you have ’em!
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