/usr/share/snmp/mib2c-data/ is in libsnmp-base 5.7.3+dfsg-1.7+deb9u1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/snmp/mib2c-data/default-mfd-top.m2c
/usr/share/snmp/mib2c-data/details-enums.m2i
/usr/share/snmp/mib2c-data/details-node.m2i
/usr/share/snmp/mib2c-data/details-table.m2i
/usr/share/snmp/mib2c-data/generic-ctx-copy.m2i
/usr/share/snmp/mib2c-data/generic-ctx-get.m2i
/usr/share/snmp/mib2c-data/generic-ctx-set.m2i
/usr/share/snmp/mib2c-data/generic-data-allocate.m2i
/usr/share/snmp/mib2c-data/generic-data-context.m2i
/usr/share/snmp/mib2c-data/generic-get-U64.m2i
/usr/share/snmp/mib2c-data/generic-get-char.m2i
/usr/share/snmp/mib2c-data/generic-get-decl-bot.m2i
/usr/share/snmp/mib2c-data/generic-get-decl.m2i
/usr/share/snmp/mib2c-data/generic-get-long.m2i
/usr/share/snmp/mib2c-data/generic-get-oid.m2i
/usr/share/snmp/mib2c-data/generic-header-bottom.m2i
/usr/share/snmp/mib2c-data/generic-header-top.m2i
/usr/share/snmp/mib2c-data/generic-source-includes.m2i
/usr/share/snmp/mib2c-data/generic-table-constants.m2c
/usr/share/snmp/mib2c-data/generic-table-enums.m2c
/usr/share/snmp/mib2c-data/generic-table-indexes-from-oid.m2i
/usr/share/snmp/mib2c-data/generic-table-indexes-set.m2i
/usr/share/snmp/mib2c-data/generic-table-indexes-to-oid.m2i
/usr/share/snmp/mib2c-data/generic-table-indexes-varbind-setup.m2i
/usr/share/snmp/mib2c-data/generic-table-indexes.m2i
/usr/share/snmp/mib2c-data/generic-table-oids.m2c
/usr/share/snmp/mib2c-data/generic-value-map-func.m2i
/usr/share/snmp/mib2c-data/generic-value-map-reverse.m2i
/usr/share/snmp/mib2c-data/generic-value-map.m2i
/usr/share/snmp/mib2c-data/m2c-internal-warning.m2i
/usr/share/snmp/mib2c-data/m2c_setup_enum.m2i
/usr/share/snmp/mib2c-data/m2c_setup_node.m2i
/usr/share/snmp/mib2c-data/m2c_setup_table.m2i
/usr/share/snmp/mib2c-data/m2c_table_save_defaults.m2i
/usr/share/snmp/mib2c-data/mfd-access-container-cached-defines.m2i
/usr/share/snmp/mib2c-data/mfd-access-unsorted-external-defines.m2i
/usr/share/snmp/mib2c-data/mfd-data-access.m2c
/usr/share/snmp/mib2c-data/mfd-data-get.m2c
/usr/share/snmp/mib2c-data/mfd-data-set.m2c
/usr/share/snmp/mib2c-data/mfd-doxygen.m2c
/usr/share/snmp/mib2c-data/mfd-interactive-setup.m2c
/usr/share/snmp/mib2c-data/mfd-interface.m2c
/usr/share/snmp/mib2c-data/mfd-makefile.m2m
/usr/share/snmp/mib2c-data/mfd-persistence.m2i
/usr/share/snmp/mib2c-data/mfd-readme.m2c
/usr/share/snmp/mib2c-data/mfd-top.m2c
/usr/share/snmp/mib2c-data/node-get.m2i
/usr/share/snmp/mib2c-data/node-set.m2i
/usr/share/snmp/mib2c-data/node-storage.m2i
/usr/share/snmp/mib2c-data/node-validate.m2i
/usr/share/snmp/mib2c-data/node-varbind-validate.m2i
/usr/share/snmp/mib2c-data/parent-dependencies.m2i
/usr/share/snmp/mib2c-data/parent-set.m2i
/usr/share/snmp/mib2c-data/subagent.m2c
/usr/share/snmp/mib2c-data/syntax-COUNTER64-get.m2i
/usr/share/snmp/mib2c-data/syntax-DateAndTime-get.m2d
/usr/share/snmp/mib2c-data/syntax-DateAndTime-get.m2i
/usr/share/snmp/mib2c-data/syntax-DateAndTime-readme.m2i
/usr/share/snmp/mib2c-data/syntax-InetAddress-get.m2i
/usr/share/snmp/mib2c-data/syntax-InetAddress-set.m2i
/usr/share/snmp/mib2c-data/syntax-InetAddressType-get.m2i
/usr/share/snmp/mib2c-data/syntax-InetAddressType-set.m2i
/usr/share/snmp/mib2c-data/syntax-RowStatus-dependencies.m2i
/usr/share/snmp/mib2c-data/syntax-RowStatus-get.m2i
/usr/share/snmp/mib2c-data/syntax-RowStatus-varbind-validate.m2i
/usr/share/snmp/mib2c-data/syntax-StorageType-dependencies.m2i
/usr/share/snmp/mib2c-data/syntax-TestAndIncr-get.m2i