/usr/lib/ is in libnet-libdnet-perl 0.98-1+b4.
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/perl5/5.24/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet/Arp.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet/Entry/
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet/Entry/Intf.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet/Eth.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet/Fw.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet/Intf.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet/Ip.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet/Route.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet/Tun.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/Net/Libdnet.pm
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/Net/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/Net/Libdnet/
/usr/lib/x86_64-linux-gnu/perl5/5.24/auto/Net/Libdnet/Libdnet.so