Rob - can you post your OSSEC version of the log?  I can check my rules. 
 These are a culmination of gleaned rules that I updated some time back 
with new event IDs.  Yours is covered in there....  but I would like to 
test it against a valid OSSEC log.  So if you can post it from the OSSEC 
logs, that'd be great.

Here they are..

</group>
<!-- Microsoft Security Essentials rules -->
<!-- see https://technet.microsoft.com/en-us/library/hh144989.aspx -->
<group name="windows,mse,">
  <rule id="720001" level="0">
    <category>windows</category>
    <if_sid>18101,18102,18103</if_sid>
    <extra_data>^Microsoft Antimalware</extra_data>
    <description>Grouping of Microsoft Security Essentials 
rules.</description>
  </rule>

  <rule id="720010" level="12">
    <if_sid>720001</if_sid>
    <id>^1118$|^1119$</id>
    <group>virus,</group>
    <description>Microsoft Security Essentials - Virus detected, but unable 
to remove.</description>
  </rule>
  <rule id="720011" level="7">
    <if_sid>720001</if_sid>
    <id>^1117$</id>
    <group>virus,</group>
    <description>Microsoft Security Essentials - Virus detected and 
properly removed.</description>
  </rule>

  <rule id="720012" level="7">
    <if_sid>720001</if_sid>
    <id>^1119$|^1118$|^1117$|^1116$</id>
    <group>virus,</group>
    <description>Microsoft Security Essentials - Virus 
detected.</description>
  </rule>

  <rule id="720013" level="7">
    <if_sid>720001</if_sid>
    <id>^1015$</id>
    <group>virus,</group>
    <description>Microsoft Security Essentials - Suspicious activity 
detected.</description>
  </rule>

   <!-- Service conditions and errors -->
  <rule id="720020" level="3">
    <if_sid>720001</if_sid>
    <id>^5007$</id>
    <description>Microsoft Security Essentials - Configuration 
changed.</description>
    <group>policy_changed,</group>
  </rule>
  <rule id="720021" level="9">
    <if_sid>720001</if_sid>
    <id>^5008$</id>
    <description>Microsoft Security Essentials - Service 
failed.</description>
  </rule>
  <rule id="720022" level="9">
    <if_sid>720001</if_sid>
    <id>^3002$</id>
    <description>Microsoft Security Essentials - Real time protection 
failed.</description>
  </rule>
  <rule id="720023" level="8">
    <if_sid>720001</if_sid>
    <id>^2012$</id>
    <description>Microsoft Security Essentials - Cannot use Dynamic 
Signature Service.</description>
  </rule>
  <rule id="720024" level="8">
    <if_sid>720001</if_sid>
    <id>^2004$</id>
    <description>Microsoft Security Essentials - Loading definitions 
failed. Using last good set.</description>
  </rule>
  <rule id="720025" level="8">
    <if_sid>720001</if_sid>
    <id>^2003$</id>
    <description>Microsoft Security Essentials - Engine update 
failed.</description>
  </rule>
  <rule id="720026" level="8">
    <if_sid>720001</if_sid>
    <id>^2001$</id>
    <description>Microsoft Security Essentials - Definitions update 
failed.</description>
  </rule>
  <rule id="720027" level="7">
    <if_sid>720001</if_sid>
    <id>^1005$</id>
    <description>Microsoft Security Essentials - Scan error. Scan has 
stopped.</description>
  </rule>
  <rule id="720028" level="5">
    <if_sid>720001</if_sid>
    <id>^1002$</id>
    <description>Microsoft Security Essentials - Scan stopped before 
completion.</description>
  </rule>

  <!-- EICAR test file special case -->
  <!-- www.eicar.org/86-0-Intended-use.html -->
  <rule id="720041" level="5">
    <if_sid>720012</if_sid>
    <match>Virus:DOS/EICAR_Test_File</match>
    <options>alert_by_email</options>
    <description>Microsoft Security Essentials - EICAR test file 
detected.</description>
  </rule>
  <rule id="720042" level="3">
    <if_sid>720011</if_sid>
    <match>Virus:DOS/EICAR_Test_File</match>
    <options>alert_by_email</options>
    <description>Microsoft Security Essentials - EICAR test file 
removed.</description>
  </rule>
  <rule id="720043" level="8">
    <if_sid>720010</if_sid>
    <match>Virus:DOS/EICAR_Test_File</match>
    <options>alert_by_email</options>
    <description>Microsoft Security Essentials - EICAR test file detected, 
but removal failed.</description>
  </rule>

  <!-- Status messages -->
  <rule id="720050" level="3">
    <if_sid>720001</if_sid>
    <id>^2000$</id>
    <description>Microsoft Security Essentials - Signature database 
updated.</description>
  </rule>
  <rule id="720051" level="3">
    <if_sid>720001</if_sid>
    <id>^2002$</id>
    <description>Microsoft Security Essentials - Scan engine 
updated.</description>
  </rule>
  <rule id="720053" level="3">
    <if_sid>720001</if_sid>
    <id>^1000$|^1001$</id>
    <description>Microsoft Security Essentials - Scan started or 
stopped.</description>
  </rule>
  <rule id="720054" level="4">
    <if_sid>720001</if_sid>
    <id>^1013$</id>
    <description>Microsoft Security Essentials - History 
cleared.</description>
  </rule>

  <!-- Time based alerts -->
  <rule id="720070" level="10" frequency="4" timeframe="240">
    <if_matched_sid>720011</if_matched_sid>
    <description>Multiple Microsoft Security Essentials AV warnings 
detected.</description>
  </rule>
  <rule id="720071" level="10" frequency="4" timeframe="240">
    <if_matched_sid>720012</if_matched_sid>
    <description>Multiple Microsoft Security Essentials AV warnings 
detected.</description>
  </rule>

</group> <!-- mse -->


On Friday, April 22, 2016 at 1:16:22 PM UTC-7, Rob B wrote:
>
> Hello All,
>
>    Does anyone have a decoder for Windows Defender floating around out 
> there??
>
> Im having a heck of a time...   Here is the event channel event example if 
> anyone is curious or can help:  (Win10 box)
>
> Log Name:      Microsoft-Windows-Windows Defender/Operational
> Source:        Microsoft-Windows-Windows Defender
> Date:          4/22/2016 4:05:17 PM
> Event ID:      1116
> Task Category: None
> Level:         Warning
> Keywords:      
> User:          SYSTEM
> Computer:      VICTIM0
> Description:
> Windows Defender has detected malware or other potentially unwanted 
> software.
>  For more information please see the following:
>
> http://go.microsoft.com/fwlink/?linkid=37020&name=Trojan:Win32/Bagsu!rfn&threatid=2147694406&enterprise=0
>   Name: Trojan:Win32/Bagsu!rfn
>   ID: 2147694406
>   Severity: Severe
>   Category: Trojan
>   Path: 
> containerfile:_\\10.0.1.10\share\Malware_For_Demo\REAL_BAD_Malz2\Server.exe;file:_\\10.0.1.10\share\Malware_For_Demo\REAL_BAD_Malz2\Server.exe;file:_\\10.0.1.10\share\Malware_For_Demo\REAL_BAD_Malz2\Server.exe->(VFS:svchost.exe)
>   Detection Origin: Network share
>   Detection Type: Concrete
>   Detection Source: Real-Time Protection
>   User: frog
>   Process Name: C:\Windows\explorer.exe
>   Signature Version: AV: 1.217.2054.0, AS: 1.217.2054.0, NIS: 115.8.0.0
>   Engine Version: AM: 1.1.12603.0, NIS: 2.1.11804.0
>
> Event Xml:
> <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event";>
>   <System>
>     <Provider Name="Microsoft-Windows-Windows Defender" 
> Guid="{11CD958A-C507-4EF3-B3F2-5FD9DFBD2C78}" />
>     <EventID>1116</EventID>
>     <Version>0</Version>
>     <Level>3</Level>
>     <Task>0</Task>
>     <Opcode>0</Opcode>
>     <Keywords>0x8000000000000000</Keywords>
>     <TimeCreated SystemTime="2016-04-22T20:05:17.551083000Z" />
>     <EventRecordID>95</EventRecordID>
>     <Correlation ActivityID="{ECC2B320-F9A6-41AD-9F17-5C9EE24D3330}" />
>     <Execution ProcessID="2332" ThreadID="4540" />
>     <Channel>Microsoft-Windows-Windows Defender/Operational</Channel>
>     <Computer>VICTIM0</Computer>
>     <Security UserID="S-1-5-77" />
>   </System>
>   <EventData>
>     <Data Name="Product Name">%%827</Data>
>     <Data Name="Product Version">4.9.10586.0</Data>
>     <Data Name="Detection ID">{CAADD684-36C9-444B-8A6D-8CE537A93E40}</Data>
>     <Data Name="Detection Time">2016-04-22T20:04:40.369Z</Data>
>     <Data Name="Unused">
>     </Data>
>     <Data Name="Unused2">
>     </Data>
>     <Data Name="Threat ID">2147694406</Data>
>     <Data Name="Threat Name">Trojan:Win32/Bagsu!rfn</Data>
>     <Data Name="Severity ID">5</Data>
>     <Data Name="Severity Name">Severe</Data>
>     <Data Name="Category ID">8</Data>
>     <Data Name="Category Name">Trojan</Data>
>     <Data Name="FWLink">
> http://go.microsoft.com/fwlink/?linkid=37020&amp;name=Trojan:Win32/Bagsu!rfn&amp;threatid=2147694406&amp;enterprise=0
> </Data>
>     <Data Name="Status Code">1</Data>
>     <Data Name="Status Description">
>     </Data>
>     <Data Name="State">1</Data>
>     <Data Name="Source ID">3</Data>
>     <Data Name="Source Name">%%818</Data>
>     <Data Name="Process Name">C:\Windows\explorer.exe</Data>
>     <Data Name="Detection User">frog</Data>
>     <Data Name="Unused3">
>     </Data>
>     <Data 
> Name="Path">containerfile:_\\10.0.1.10\share\Malware_For_Demo\REAL_BAD_Malz2\Server.exe;file:_\\10.0.1.10\share\Malware_For_Demo\REAL_BAD_Malz2\Server.exe;file:_\\10.0.1.10\share\Malware_For_Demo\REAL_BAD_Malz2\Server.exe-&gt;(VFS:svchost.exe)</Data>
>     <Data Name="Origin ID">2</Data>
>     <Data Name="Origin Name">%%846</Data>
>     <Data Name="Execution ID">1</Data>
>     <Data Name="Execution Name">%%813</Data>
>     <Data Name="Type ID">0</Data>
>     <Data Name="Type Name">%%822</Data>
>     <Data Name="Pre Execution Status">0</Data>
>     <Data Name="Action ID">9</Data>
>     <Data Name="Action Name">%%887</Data>
>     <Data Name="Unused4">
>     </Data>
>     <Data Name="Error Code">0x00000000</Data>
>     <Data Name="Error Description">The operation completed successfully. 
> </Data>
>     <Data Name="Unused5">
>     </Data>
>     <Data Name="Post Clean Status">0</Data>
>     <Data Name="Additional Actions ID">0</Data>
>     <Data Name="Additional Actions String">No additional actions 
> required</Data>
>     <Data Name="Remediation User">
>     </Data>
>     <Data Name="Unused6">
>     </Data>
>     <Data Name="Signature Version">AV: 1.217.2054.0, AS: 1.217.2054.0, 
> NIS: 115.8.0.0</Data>
>     <Data Name="Engine Version">AM: 1.1.12603.0, NIS: 2.1.11804.0</Data>
>   </EventData>
> </Event>
>
>
> Thanks!, Rob
>

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