Ransomware jako model umělé inteligence vytvořený bez námahy

Researchers went looking for a fake photo upscaler and found something stranger: a Ransomware kit an AI model helped design without anyone teaching it how. No skilled coder sat down and wrote this attack line by line. Instead, an AI chatbot pieced most of it together from a single broad request, and in the end, part of it worked exactly as intended by whoever asked.

This story fits a bigger pattern facing society and keeping security professionals up at night. AI tools are changing what cyber attacks look like, how damaging they are, and who can build them. People with no coding background now type a request into a chatbot and walk away with working malware! The fortunate thing is this, delivery and execution remain the same for these attacks as before. Your educated cybersecurity habits remain the best defense against these emerging AI threats we all face.

The Details: The Fake Upscaler App

The malicious website tool was called InfernoGrabber. On the surface, it posed as a Discord avatar upscaler, a small utility people often install without much thought. Underneath the friendly looking icon sat a program built to steal Discord logins, credit card numbers, crypto recovery phrases, keystrokes, and webcam footage. Meanwhile, Výzkum Check Point found this sample while reviewing files linked to the AI model DeepSeek, and in the process, flagged well over a thousand similar malicious files in the same batch. CyberHoot included a 2026 training video on similar attack vectors – malicious browser extensions. These are emerging AI-powered threats we all need to be aware of.

The New Trick: Ransomware Inside Your Browser

Here is the part worth understanding. Deep inside the malware sat a fresh technique: file locking ransomware running straight inside a browser, with no download and no install required! We now have our first documented example of an attack that, until now, wasthought to be impossible to accomplish by most security experts.

The trick uses a real browser feature called the File System Access API. Normally, legitimate tools such as photo editors and document apps use this feature to ask for permission to open a folder on your device. Here, though, the attackers built a fake AI photo upscaler around the same feature. First, a person picks a photo, chooses a folder for the finished result, and approves a permission prompt that feels routine in the moment. Once approved, the page then reads the files in that folder, copies them out, locks the originals, and finally shows a ransom note demanding payment in Bitcoin.

Check Point tested the technique on Windows, macOS, Linux, and Android, plus Microsoft Edge, and it worked in every case except one. Specifically, Apple’s Safari does not offer the same folder access feature, so iPhone users sit outside this particular risk.

Why Android Users Deserve Extra Attention

Android carries added risk here. For example, recent versions of Chrome for Android allow websites to request access to camera roll folders such as DCIM, where phones store photos, screenshots, and scanned documents. As a result, a folder full of personal photos and banking screenshots turns into an appealing target the moment a website gains write access to it.

Skutečná lekce

The unsettling part isn’t the malware itself. After all, plenty of information stealing kits already circulate online. Rather, the unsettling part is how this one got built. According to Check Point’s researchers, the AI model connected a fictional ransomware idea with a real browser feature on its own, starting from one broad prompt. Notably, no manual coding and no browser expertise were required on the human side. The implication here is significant: the bar has been lowered for anyone curious enough to try and write ransomware. One caveat is worth mentioned here. This malware was created on the DeepSeek AI frontier model. CyberHoot believes US-based frontier models have critical guardrails to prevent this from being possible, even with purposeful prompts.

Simple Steps to Stay Ahead

1. Add folder permission prompts to the growing list of App permissions you need to evaluate and sometimes deny. Before clicking Allow, check which website is asking and whether the request matches what you came to do.
2. Skip unfamiliar “AI tool” browser extensions or web apps, especially ones offering free image upscaling, avatar generation, or similar shortcuts from sources you don’t recognize.
3. Be extra cautious with brand-new apps. A newer release date means fewer people have tested the app, reviewed its behavior, or discovered hidden risks. When an app is brand new, wait, research the vendor, and look for trusted reviews before granting access to files, folders, or browser data.
4. Keep a backup of your important files somewhere outside your browser’s reach. An external drive or a cloud backup with version history handles this well and costs little.
5. Keep your browser updated. Vendors patch permission handling and security controls on a regular schedule, and staying current keeps those fixes working for you.
6. Talk this one through with your team. A five minute conversation about pausing before you click Allow builds a habit that pays off well beyond this one threat.

Hoot Up

You don’t need a security degree to stay ahead of this one. Small habits, like pausing before granting folder access and keeping backups current, stop most attacks like this before they start. Pick one habit from this list and put it into practice today. Progress beats perfection every time, and reading this already puts you a step ahead of where you were yesterday.

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Zdroje:

• The Hacker News, AI-Generated Browser Ransomware Abuses Chromium API on Windows, Linux, macOS, Android https://thehackernews.com/2026/07/ai-generated-browser-ransomware-abuses.html
• Check Point Research, Browser-Only Ransomware: From LLM Hallucinations to a Practical Attack Technique https://research.checkpoint.com/2026/browser-only-ransomware-from-llm-hallucinations-to-a-practical-attack-technique/
• Security MEA, Check Point Uncovers AI-Generated Browser Ransomware Technique https://securitymea.com/2026/07/02/check-point-uncovers-ai-generated-browser-ransomware-technique/
• GBHackers, Browser-Only Ransomware Uses File System Access API to Encrypt Files Without Malware Installation https://gbhackers.com/browser-only-ransomware-uses-file-system/amp/

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