/usr/share/ECM/modules/ is in extra-cmake-modules 5.44.0-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/ECM/modules/ECMAddAppIcon.cmake
/usr/share/ECM/modules/ECMAddQch.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/ECMFindQMLModule.cmake.in
/usr/share/ECM/modules/ECMGenerateHeaders.cmake
/usr/share/ECM/modules/ECMGeneratePkgConfigFile.cmake
/usr/share/ECM/modules/ECMGeneratePriFile.cmake
/usr/share/ECM/modules/ECMGenerateQmlTypes.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/ECMQMLModules.cmake
/usr/share/ECM/modules/ECMQchDoxygen.config.in
/usr/share/ECM/modules/ECMQchDoxygenLayout.xml
/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/ECMWinResolveSymlinks.cmake
/usr/share/ECM/modules/ecm_uninstall.cmake.in