4rthur is a group of offensive security specialists in Kuala Lumpur. We built our own tooling because the alternative was billing you for the time it takes to do it by hand.

Ex-Malware Researcher to Ex-Cyber Engineer, Now doing Offensive Security, with AI.
LinkedIn ↗Earned credentials, held across the team.






Licence 20381-02, issued by the National Cyber Security Agency of Malaysia under the Cyber Security Act 2024.
We research LLM and agent attacks together, run training through the u9up community, and bring u9up researchers onto our AI Offensive Assessment engagements, under our supervision. Two of our co-founders also co-founded u9up.
u9up.com ↗The Adversarial Assessment takes a company name and reports what an attacker can already reach. Free for a limited time.
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