OID for Content Analysis Software
Extract OID from MIBs file
You can get the latest MIB on the appliance itself. On the CAS appliance go to settings > SNMP; you'll see a download MIBs button
With the MIB files you can extract the OID using online software MIB browser etc.
Online recommended software is ireasoning. iReasoning is a MIB browser is an indispensable tool for engineers to manage SNMP enabled network devices and applications