According to TechFlow, on December 16, SlowMist Chief Information Security Officer 23pds issued a warning that the well-known cryptocurrency stealing Trojan MacOS Stealer was suddenly open sourced recently. Previously, its attack source code was sold for 1 BTC, and now open source means that more malicious attackers can easily obtain this tool. This may not only allow attackers to have an attack library, but also may give rise to more covert and complex attack methods, bringing greater challenges to the security of cryptocurrency assets.