Most security tools monitor "hooks" in the user mode of Windows (e.g., ntdll.dll ). Hell's Gate allows a program to bypass these hooks by making direct system calls (syscalls) to the kernel.
Modern red teamers use the HellsGate Implementation on GitHub to create evasive loaders that are difficult for antivirus programs to catch. Risks of Downloading File Binders
Searching for a "Hellgate download file binder" online carries significant risks: