Game version:
http://dev.narc.ro/cataclysm/jenkins-latest/Windows/Tiles/cataclysmdda-0.C-7433.zip
Operating system:
Windows 10
Tiles or curses:
tiles
http://dev.narc.ro/cataclysm/jenkins-latest/Windows/Tiles/cataclysmdda-0.C-7433.zip
Mods active:
n/a
no trojan warnings
trojan warning
Trojan:Win32/Azden.B!cl
https://www.microsoft.com/en-us/wdsi/threats/malware-encyclopedia-description?name=Trojan%3aWin32%2fAzden.B!cl&threatid=2147723291
download build 7433 (link above)
wait a few minutes for Windows Defender scan to pick it up or right-click zip file an initiate manual scan
screenshot of windows defender trojan info warning attached:

Does cdda even contain any networking functions?
It looks like (I'm a Linux guy so I could be wrong) that you are running the executable from the zip file, could you try extracting it and running/scanning the .exe in it's unextracted form?
Heuristic antivirus has false positives sometimes based on random happenstance, and there's nothing we can do about it.
@pipehat try scanning 7423 and see if there's still a problem
7426, my prev version, is fine
also odd that there don't appear to be new builds for last several days at:
http://dev.narc.ro/cataclysm/jenkins-latest/Windows_x64/Tiles/
there don't appear to be new builds for last several days
The build machine was down due to a hardware fault, see #23865.
Most helpful comment
Heuristic antivirus has false positives sometimes based on random happenstance, and there's nothing we can do about it.