The global ransomware group listed Atcomm on its data leak site on 2026-08-28. Country: CN Sector: Technology Domains named: www.atcomm.cn Claim as published on the leak site: @comm is a Shanghai‑based agency specializing in PR, digital marketing, and human‑AI collaboration. It leverages data and AI to help brands grow. The company operates from Room 2103, SK Building, in Pudong New Area.