/usr/lib/x86_64-linux-gnu/kamailio/ is in kamailio-perl-modules 4.3.4-1.1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/x86_64-linux-gnu/kamailio/modules/
/usr/lib/x86_64-linux-gnu/kamailio/modules/app_perl.so
/usr/lib/x86_64-linux-gnu/kamailio/modules/db_perlvdb.so
/usr/lib/x86_64-linux-gnu/kamailio/perl/
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/Constants.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/LDAPUtils/
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/LDAPUtils/LDAPConf.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/LDAPUtils/LDAPConnection.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/Message.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/Utils/
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/Utils/Debug.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/Utils/PhoneNumbers.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Adapter/
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Adapter/AccountingSIPtrace.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Adapter/Alias.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Adapter/Auth.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Adapter/Describe.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Adapter/Speeddial.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Adapter/TableVersions.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Column.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Pair.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/ReqCond.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Result.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/VTab.pm
/usr/lib/x86_64-linux-gnu/kamailio/perl/Kamailio/VDB/Value.pm