Iconswap program used by the packager is flagged as malware by Windows Defender

After upgrading to 8u112 on Windows 10 my build failed with the message:

Exception: java.io.IOException: Cannot run program "C:\Users\spalmer\AppData\Local\Temp\iconswap2930071229376508731.exe": CreateProcess error=225, Operation did not complete successfully because the file contains a virus or potentially unwanted software

There was a popup from Windows Defender indicating that it stopped a threat. Checking the details in the Windows Defender UI I found that it identified the iconswap program and the launcher.exe that it was trying to swap the icon into as:
Trojan:Win32/Detplock
Trojan:Win32/Repjexi

The description of the threat merely says something along the lines of "this program does stuff that malware often does" - which I guess is technically correct as it is modifying an exe file.

The issue may be with Windows Defender, but perhaps Microsoft can be notified to whitelist this application.

When I explicitly selected "Allow Item" in Windows Defender for each of the listed threats (two temp copies of iconswap and the destination launcher.exe were listed) the next build succeeded.

I can't be sure if 8u112 introduced the problem or if I forgot that I whitelisted the files from my older JDK.