Find password change on EBS module owner

Sometimes, EBS module schema's password was changed by using sqlplus, not by using FNDCPASS. If the module is not used (in inactive), EBS will not report error until adpatch applies a patch or runs an upgrade.

Is there a way to find which password was changed without using EBS utility FNDCPASS ?   I hope there is a script to find the module schema name. I am using R12.1.

Thank you.