BlackMould

BlackMould is a type of malware, specifically a native web shell, that has been observed in use by GALLIUM, a China-aligned intrusion group. This malicious software is designed to exploit and damage computer systems, often infiltrating them through suspicious downloads, emails, or websites without the user's knowledge. BlackMould is based on the China Chopper web shell and is particularly tailored for servers running Microsoft IIS. This malware was identified and named by Microsoft. The primary function of BlackMould is to target network devices, including routers, Internet-exposed servers, and edge devices. It achieves this by leveraging vulnerabilities in these systems, often referred to as "zero-day vulnerabilities". These are previously unknown flaws in software that can be exploited before they are discovered and fixed by the software's creators. By exploiting such vulnerabilities, BlackMould can infiltrate and take control of a system. Once inside a system, BlackMould has the capability to perform various tasks on the victim host. Although the specific functionalities were not detailed in the provided information, typical malware actions may include stealing personal information, disrupting operations, or holding data hostage for ransom. The activities of BlackMould underscore the importance of robust cybersecurity measures, including regular system updates and patches, to protect against such threats.