A new macOS backdoor, known as HZ Rat, is targeting users of China's popular messaging applications DingTalk and WeChat. This malware has been identified as a threat to these platforms, which are widely used for communication in China. The backdoor allows attackers to potentially access sensitive information from users of these applications. The issue was highlighted by Securelist, a cybersecurity platform, and has raised concerns about the security of macOS devices used in professional environments.