/usr/lib/x86_64-linux-gnu/ is in libb-hooks-op-check-perl 0.22-1.
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/B/
/usr/lib/x86_64-linux-gnu/perl5/5.26/B/Hooks/
/usr/lib/x86_64-linux-gnu/perl5/5.26/B/Hooks/OP/
/usr/lib/x86_64-linux-gnu/perl5/5.26/B/Hooks/OP/Check/
/usr/lib/x86_64-linux-gnu/perl5/5.26/B/Hooks/OP/Check/Install/
/usr/lib/x86_64-linux-gnu/perl5/5.26/B/Hooks/OP/Check/Install/Files.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/B/Hooks/OP/Check/Install/hook_op_check.h
/usr/lib/x86_64-linux-gnu/perl5/5.26/B/Hooks/OP/Check.pm
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/B/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/B/Hooks/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/B/Hooks/OP/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/B/Hooks/OP/Check/
/usr/lib/x86_64-linux-gnu/perl5/5.26/auto/B/Hooks/OP/Check/Check.so