@wolfpaw21 CnCNet has been a staple of the C&C community for over a decade. It is a community dedicated to keeping the classic C&C games and their online play working. I've been involved with the people behind the project for almost two decades now.
Virus scanners nowadays are insanely paranoid about anything they don't know, which is extremely tedious for anyone making their own programs. This is especially problematic for projects like CnCNet that do fan-patching of existing games, since fan-patching is very easy to confuse with viruses; both modify existing programs, but while viruses do that for malicious purposes, fan-patches do it to fix errors and make the games run better.
But if you download the files from the official sites (bitpatch.com for ddwrapper, cncnet.org for the CnCNet installers), you should be perfectly safe.
Note that CnCNet links to downloads on cnc-comm.com; the C&C Communications Center, but this is the site that hosts CnCNet, and the community from which CnCNet originally grew. Some of the downloads they link to (like the full download for the patched C&C95; a project I did myself) are also hosted on ModDB.