Update Apps/System account password for EBS environment in STAT from backend

The scenario is when the DBA team changes the APPS and System schema password in Oracle APPS we have to change it in STAT client. We want to automate this process for STAT. Rather than changing password for each EBS environment manually we want it to change from backend through some script. We have about 100+ EBS environment and for each EBS environment it is very time consuming to change password manually from STAT client. Please help us since Quest only recommends using the STAT client