/usr/lib/ is in libwebauth-perl 4.7.0-3build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.22/
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Keyring.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Tests.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/WebKDCService.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/App.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/Login.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/WebKDCFactor.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/Cred.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/Id.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/WebKDCProxy.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/Request.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/Error.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token/Proxy.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Exception.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Krb5.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/KeyringEntry.pod
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Token.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/WebAuth/Key.pm
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/WebAuth/
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/WebAuth/WebAuth.bs
/usr/lib/x86_64-linux-gnu/perl5/5.22/auto/WebAuth/WebAuth.so