Rule 18257 appears to be prone to misfire.  I see it tripping for things
like this:

2016 Nov 18 10:37:26 WinEvtLog: Application: INFORMATION(302): ESENT: (no
user): no domain: BNC-O9020: Music.UI (25428)
{87E550B7-AD4D-40F7-BE5E-263C3D44C124}: The database engine has
successfully completed recovery steps.


See:

https://github.com/ossec/ossec-hids/blob/master/etc/rules/msauth_rules.xml

  <rule id="18257" level="3">
    <if_sid>18101</if_sid>
    <id>^200$|^300$|^302$</id>
    <description>Windows: TS Gateway login success.</description>
    <group>authentication_success,pci_dss_10.2.5,</group>
    <info>https://technet.microsoft.com/en-us/library/cc775181(v=ws.10).aspx
</info>
  </rule>

This would appear to fire on every single Windows informational event
except for event IDs 200, 300, and 302.  I presume some other piece of
matching criteria is missing.

Kevin

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