Cant sign maitenance tool after installer is created

I'm trying to code sign maintenance tool.exe crated by binarytool.

installerbase.exe is the one that comes with Qt Installer Framework 4.8.0, but after binarycreator produced exe is patched somehow and can't be signed anymore.

I'm getting Signing failed with error 800700C1.

I think there was an issue before similar on macOS, and patching binary ins't done there anymore and additional data stored in app bundle.