Key Findings: Major data leak from Chinese security firm Knownsec (aka Chuangyu) in November 2025, with over 12,000 secret files briefly appearing on GitHub. Leak provided a rare insight into China's government-backed hacking tools and operations. The data theft may have occurred as early as 2023, but the files were taken down quickly. Background Knownsec is a prominent player in China's cybersecurity industry, having received a significant investment from Tencent in 2015 and
