OID value: 1.3.6.1.4.1.5923.1.5.1.2
OID description:
The values of hasMember are identifiers for entities that are members of the group in whose entry this attribute occurs
URL for further info: http://middleware.internet2.edu/dir/docs/internet2-mace-dir-ldap-group-membership-200507.html
See also the OID Repository website reference for 1.3.6.1.4.1.5923.1.5.1.2