Malware
Horus
According to Check Point Research, this is a custom-built agent for Mythic, the open-source red teaming C2 framework.
Horus is a Windows malware family operated by Stealth Falcon.
Background
Check Point Research describes this as a bespoke agent for Mythic, the open-source red-teaming C2 framework. Implemented in C++, the implant shares little meaningful code with the known C-based Mythic agents, beyond the generic logic needed for Mythic C2 communications.
Source: Malpedia (Fraunhofer FKIE).