/usr/lib/x86_64-linux-gnu/ is in libcrypt-u2f-server-perl 0.40-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/perl5/
/usr/lib/x86_64-linux-gnu/perl5/5.26/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Crypt/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Crypt/U2F/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Crypt/U2F/Server/
/usr/lib/x86_64-linux-gnu/perl5/5.26/Crypt/U2F/Server/Simple.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/Crypt/U2F/Server.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Crypt/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Crypt/U2F/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Crypt/U2F/Server/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Crypt/U2F/Server/Server.so
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/Crypt/U2F/Server/autosplit.ix