Somebody told DeepSeek to build in-browser ransomware and it gleefully complied

Check Point Research analyzed an AI-generated sample from DeepSeek—a browser-based toolkit dubbed “InfernoGrabber 9000”—which demonstrates how an attacker can abuse the File System Access API and social engineering to steal data and perform browser-only ransomware operations; while the original sample was incomplete, the researchers created a working proof-of-concept and observed attempts by real actors, highlighting an emerging high-risk vector where LLMs lower the skill barrier for creating effective in-browser malware.