[seler]

Hi there,
I'm searching RAT with server based on web-application or working on MacOS, but I want to compile client file (rat) to run on Widows.
Can you recommend me something like that?

[CyberStrike]

Well you can install i686-w64-mingw32-gcc as well as osx comes with python and using Wine installing python for windows and pyinstaller to compile into exe's doable all of this. Although it might be easier to just skip all this and have a VM with say Kali and use metasploit or any number of other payload generation software. When you talk about a server based on a web app you mean like a desktop app which you can backdoor? or what exactly?

[cyberowner]

Else there is Web Monitore which is web based.