Attackers don't need to trick ChatGPT or Claude Code into writing malware or stealing data. There's a whole class of LLMs built especially for the job.

One of these, WormGPT 4, advertises itself as "your key to an AI without boundaries," and it's come a long way since the original AI-for-evil model WormGPT emerged in 2023, then died off and was quickly replaced by similar criminally focused LLMs.

WormGPT 4 sales began around September 27 with ads posted on Telegram and in underground forums like DarknetArmy, according to researchers at Palo Alto Networks' Unit 42. Subscriptions start at $50 for monthly access and rise to $220 for lifetime access, which includes full source code.

The WormGPT Telegram channel has 571 subscribers, and, as the threat hunters detail in a Tuesday blog post, t

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