/usr/share/ECM/ is in extra-cmake-modules 5.18.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/ECM/cmake/
/usr/share/ECM/cmake/ECMConfig.cmake
/usr/share/ECM/cmake/ECMConfigVersion.cmake
/usr/share/ECM/find-modules/
/usr/share/ECM/find-modules/ECMFindModuleHelpersStub.cmake
/usr/share/ECM/find-modules/FindEGL.cmake
/usr/share/ECM/find-modules/FindKF5.cmake
/usr/share/ECM/find-modules/FindLibGit2.cmake
/usr/share/ECM/find-modules/FindOpenEXR.cmake
/usr/share/ECM/find-modules/FindPng2Ico.cmake
/usr/share/ECM/find-modules/FindQtWaylandScanner.cmake
/usr/share/ECM/find-modules/FindSharedMimeInfo.cmake
/usr/share/ECM/find-modules/FindWayland.cmake
/usr/share/ECM/find-modules/FindWaylandScanner.cmake
/usr/share/ECM/find-modules/FindX11_XCB.cmake
/usr/share/ECM/find-modules/FindXCB.cmake
/usr/share/ECM/kde-modules/
/usr/share/ECM/kde-modules/KDECMakeSettings.cmake
/usr/share/ECM/kde-modules/KDECompilerSettings.cmake
/usr/share/ECM/kde-modules/KDEFrameworkCompilerSettings.cmake
/usr/share/ECM/kde-modules/KDEInstallDirs.cmake
/usr/share/ECM/kde-modules/KDEPackageAppTemplates.cmake
/usr/share/ECM/modules/
/usr/share/ECM/modules/ECMAddAppIcon.cmake
/usr/share/ECM/modules/ECMAddTests.cmake
/usr/share/ECM/modules/ECMCoverageOption.cmake
/usr/share/ECM/modules/ECMCreateQmFromPoFiles.cmake
/usr/share/ECM/modules/ECMEnableSanitizers.cmake
/usr/share/ECM/modules/ECMFindModuleHelpers.cmake
/usr/share/ECM/modules/ECMGenerateHeaders.cmake
/usr/share/ECM/modules/ECMGeneratePkgConfigFile.cmake
/usr/share/ECM/modules/ECMGeneratePriFile.cmake
/usr/share/ECM/modules/ECMInstallIcons.cmake
/usr/share/ECM/modules/ECMMarkAsTest.cmake
/usr/share/ECM/modules/ECMMarkNonGuiExecutable.cmake
/usr/share/ECM/modules/ECMOptionalAddSubdirectory.cmake
/usr/share/ECM/modules/ECMPackageConfigHelpers.cmake
/usr/share/ECM/modules/ECMPoQmTools.cmake
/usr/share/ECM/modules/ECMQmLoader.cpp.in
/usr/share/ECM/modules/ECMQtDeclareLoggingCategory.cmake
/usr/share/ECM/modules/ECMQtDeclareLoggingCategory.cpp.in
/usr/share/ECM/modules/ECMQtDeclareLoggingCategory.h.in
/usr/share/ECM/modules/ECMQueryQmake.cmake
/usr/share/ECM/modules/ECMSetupVersion.cmake
/usr/share/ECM/modules/ECMUninstallTarget.cmake
/usr/share/ECM/modules/ECMUseFindModules.cmake
/usr/share/ECM/modules/ECMVersionHeader.h.in
/usr/share/ECM/modules/ecm_uninstall.cmake.in
/usr/share/ECM/toolchain/
/usr/share/ECM/toolchain/Android.cmake
/usr/share/ECM/toolchain/deployment-file.json.in
/usr/share/ECM/toolchain/specifydependencies.cmake