Note that on the download page linked by
@Ravager16829 , the front page download for patch 1.27 is a link to Battle.net. So you can download and install Patch 1.27 from Battle.net when last I checked -- this means the original non-Reforged game software transfers securely over https from Microsoft-owned battlenet server to your computer, and not from a third party.
Obviously a lot of the other download links on that page, if they are not "battle.net/whatever" URLs, are downloading from third parties. If you ever feel paranoid about computer security, downloading from official Battle.net might help you with that problem.
Of course, the official game masters of the Battle Net 2.0 modern system will probably pretend this download does not exist, because it was left available on their servers either by accident or maybe by someone who is not from Marketing. In addition, if you download that version and attempt to play online, the online connection will either fail or will replace the game itself with Reforged. Definitely some of those older versions delete themselves and replace with Reforged when they go online, but I have been using that 1.27 download quite a bit and as long as I never touch the "Battle.net" menu screen button on the Frozen Throne menu, then the game never deletes itself.
Because this is an official download of the Warcraft III Reign of Chaos, and also a separate official download of the Warcraft III: Frozen Throne expansion, which come to you directly from Blizzard Entertainment servers, those games will not launch until you enter a valid CD key. I have a valid CD key, because I have owned this game for 20 years and enjoy the game. The CD keys are no longer for sale from any official source that I know of, but the mechanism inside the game for verifying the validity of the CD key is an
entirely offline mechanism meaning that any legitimate CD key included with any legitimate CD that you buy, even from a reseller, will be sufficient to install the game if it is indeed legitimate.
Edit:
It may also be worth noting that if you play the old version of the game as described above, and use it for LAN or for single player, we might feel that this is a form of rebelling against the corporation and a way of being free and not telling the corporation when we play their game, so we are resisting DRM and monitoring. However, in reality, when you play this old version of the game, the Microsoft Windows subsystems will inform Microsoft over the internet that you played this old program [even though the game program itself does not include that kind of monitoring to my knowledge]. In other words, the Reforged DRM is present to make fun of you and make you feel that DRM and monitoring are morally acceptable, but when you try to escape it you will still be monitored by Microsoft, the parent company of Blizzard, regardless - unless you rebel and use an entirely different computer operating system. However, most other operating systems contain similar levels of in-depth invisible spyware at this point.