/usr/ is in libmono-system-runtime-serialization-formatters-soap4.0-cil 3.2.8+dfsg-4ubuntu1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/
/usr/lib/mono/
/usr/lib/mono/4.0/
/usr/lib/mono/4.0/System.Runtime.Serialization.Formatters.Soap.dll
/usr/lib/mono/4.5/
/usr/lib/mono/gac/
/usr/lib/mono/gac/System.Runtime.Serialization.Formatters.Soap/
/usr/lib/mono/gac/System.Runtime.Serialization.Formatters.Soap/4.0.0.0__b03f5f7f11d50a3a/
/usr/lib/mono/gac/System.Runtime.Serialization.Formatters.Soap/4.0.0.0__b03f5f7f11d50a3a/System.Runtime.Serialization.Formatters.Soap.dll
/usr/share/
/usr/share/doc/
/usr/share/doc/libmono-system-runtime-serialization-formatters-soap4.0-cil/
/usr/share/doc/libmono-system-runtime-serialization-formatters-soap4.0-cil/copyright
/usr/lib/mono/4.5/System.Runtime.Serialization.Formatters.Soap.dll
/usr/share/doc/libmono-system-runtime-serialization-formatters-soap4.0-cil/changelog.Debian.gz