Hackers known as 'nullbulge' have taken over a Stable Diffusion tool, ComfyUI_LLMVISION, embedding malware to target users generating AI images. The hackers claim their actions are part of a crusade against art theft, crypto promotion, and AI-generated artwork. The malware, hosted on GitHub, has been harvesting user credentials, which are then used to access accounts. The hackers stated, 'We are sorry we had to do that to you,' and accused users of committing 'art theft.' The tool may have contained malicious code the entire time it has been up on GitHub, according to TechCrunch.