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Downloading Add-on for Microsoft Sysmon
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Add-on for Microsoft Sysmon

Overview
Details
Provides a data input and CIM-compliant field extractions for Microsoft Sysmon. The Microsoft Sysmon utility provides data on process creation (including parent process ID), network connections, and much more.

This add-on was originally created by Adrian Hall. We appreciate Adrian's contribution and his willingness to turn over control to the current team for ongoing maintenance and development.

For the latest version of this TA, see: https://github.com/splunk/TA-microsoft-sysmon

TA-Microsoft-Sysmon

Update History

8.0.0

6.0.8

6.0.7

6.0.6

6.0.5

  • Sep 12, 2017
  • Support for new features of Sysmon v6.10

6.0.4

  • Sep 9, 2017
  • Prep for Splunk certification.

6.0.3

6.0.2

  • Field extractions added including but not limited to cmdline, parent_process,
  • and parent_process_id.
  • Special thanks to David Dorsey (https://github.com/trogdorsey) for this contribution.

6.0.1

  • Field extractions for MD5, SHA1, SHA256, IMPHASH
  • Special thanks to David Staulcup (https://github.com/dstaulcu) for ongoing assistance and contributions

6.0.0

5.0.0

  • Updates to support sysmon V5
  • Note the sample configuration included below was modified to exclued the
  • ImageLoad section which was found to be causing BSOD on some Windows 7 test systems.
  • Special thanks to David Staulcup (https://github.com/dstaulcu) for ongoing assistance and contributions

4.0.0

3.2.3

3.2.2

3.2.1

3.1.1

  • Major modification of the version to better align with SplunkBase.
  • Fixed typos in eventtypes.conf and props.conf

0.3.1

  • Lookup table added to support Sysmon 3.1
  • Additional CIM compliance added
  • Example config added
  • Revved to version 0.3.1 to match current Sysmon version

Using this TA

Configuration: Install TA via GUI on all search heads, install via your preferred method (manual or Deployment Server) on forwarders running on Windows that have Sysmon 3.1 or greater installed.

Ensure that you have at least version 6.2.0 universal forwarders to take advantage of Windows XML event log format.

Sysmon ProcessCreate events may pick up passwords in CommandLine and ParentCommandLine fields. Depending on organizational policy you may be required to mask passwords either at search time or prior to indexing. SEDCMD entries can be added to props.conf files on search heads or indexers to mask data in known positions of passwords. Note this contribution has not been widely tested and may require substantial additional configuration and tuning effort. Use at your own risk.

SEDCMD-pwd_rule1 = s/ -pw ([^\s\<])+/ -pw ***MASK***/g

For additional info on Sysmon see: http://blogs.splunk.com/2014/11/24/monitoring-network-traffic-with-sysmon-and-splunk/

Support

This is a community supported TA. As such, post to answers.splunk.com and reference it. Someone should be with you shortly.

Pull requests via github are welcome!

Recommended Configuration

We strongly recommend that you use the popular Sysmon configuration shared by SwiftOnSecurity as your starting point:

   https://github.com/SwiftOnSecurity/sysmon-config

Previously Recommended Configuration

3/16/2017 - The following configuration guidance was included historically
but should now be considered deprecated. We suggest instead that you use the
SwiftOnSecurity configuration as a starting point, and tune it to meet your needs.
You may choose to use elements of the legacy configuration below, particularly if
you are interested in excluding common Splunk image/file names from creating Sysmon
events.

NOTE: If you choose to exclude certain events based on file name, please be aware
that this could potentially be abused by an attacker to hide malicious activity by
choosing an excluded name for their malware. If you are not willing to accept this
risk, do not use the configuration below.

Sysmon is capable of delivering a large amount of events into your
Splunk instance. The following configuration, loaded into each
system running Sysmon 3.1 or greater, will reduce the amount of data considerably.
Special thanks go to Jeff Walzer from the University of Pittsburgh for
originally helping to test this (walzer@pitt.edu).

Load this via sysmon -c (filename) from an admin-level command prompt.
(after you have placed it in a text file). You may get some
unusual errors - these are benign and can be ignored. Check the
filtering via a "sysmon -c" with no argument.

For additional Sysmon filtering, remove the entire ImageLoad section.

<sysmon schemaversion="3.2">
  <hashalgorithms>*</hashalgorithms>
  <eventfiltering>


    <driverload onmatch="exclude">
      <signature condition="contains">microsoft</signature>
      <signature condition="contains">windows</signature>
    </driverload>

    <processcreate onmatch="exclude">
      <image condition="contains">splunk</image>
      <image condition="contains">streamfwd</image>
      <image condition="contains">splunkd</image>
      <image condition="contains">splunkD</image>
      <image condition="contains">splunk</image>
      <image condition="contains">splunk-optimize</image>
      <image condition="contains">splunk-MonitorNoHandle</image>
      <image condition="contains">splunk-admon</image>
      <image condition="contains">splunk-netmon</image>
      <image condition="contains">splunk-regmon</image>
      <image condition="contains">splunk-winprintmon</image>
      <image condition="contains">btool</image>
      <image condition="contains">PYTHON</image>
    </processcreate>
    <processterminate onmatch="exclude">
      <image condition="contains">splunk</image>
      <image condition="contains">streamfwd</image>
      <image condition="contains">splunkd</image>
      <image condition="contains">splunkD</image>
      <image condition="contains">splunk</image>
      <image condition="contains">splunk-optimize</image>
      <image condition="contains">splunk-MonitorNoHandle</image>
      <image condition="contains">splunk-admon</image>
      <image condition="contains">splunk-netmon</image>
      <image condition="contains">splunk-regmon</image>
      <image condition="contains">splunk-winprintmon</image>
      <image condition="contains">btool</image>
      <image condition="contains">PYTHON</image>
    </processterminate>
    <filecreatetime onmatch="exclude">
      <image condition="contains">splunk</image>
      <image condition="contains">streamfwd</image>
      <image condition="contains">splunkd</image>
      <image condition="contains">splunkD</image>
      <image condition="contains">splunk</image>
      <image condition="contains">splunk-optimize</image>
      <image condition="contains">splunk-MonitorNoHandle</image>
      <image condition="contains">splunk-admon</image>
      <image condition="contains">splunk-netmon</image>
      <image condition="contains">splunk-regmon</image>
      <image condition="contains">splunk-winprintmon</image>
      <image condition="contains">btool</image>
      <image condition="contains">PYTHON</image>
    </filecreatetime>
  </eventfiltering>
</sysmon>

Release Notes

Version 8.0.0
July 11, 2018

Version 6.0.8
June 8, 2018

Version 6.0.7
Dec. 6, 2017

Version 6.0.5
Nov. 4, 2017

Version 6.0.4
Sept. 9, 2017

Version 6.0.3
Sept. 9, 2017

Version 6.0.2
Sept. 6, 2017

Version 6.0.0
March 13, 2017

Version 5.0.0
Nov. 22, 2016

Updated lookups to support Sysmon V5.

Version 4.0.0
Oct. 1, 2016

Version 3.2.3
May 31, 2016

Version 3.2.2
May 28, 2016

Now extracts various hash values into convenient fields. See https://github.com/splunk/TA-microsoft-sysmon/issues

Version 3.2.1
April 26, 2016

Several minor bugfixes and enhancements. Tested with Microsoft Sysmon version 3.21

Version 3.1.1
Sept. 29, 2015

3.1.1
-------
Major modification of the version to better align with SplunkBase.
Fixed typos in eventtypes.conf and props.conf

Version 0.3.1
Sept. 29, 2015

Version 0.3.1 was contributed by James Brodsky.

-Confirmed to work with Sysmon 3.1
-Some more CIM work
-new README file
-example Sysmon config (in readme)
-Lookup file to map event codes to event descriptions

Version 0.1.1
Dec. 1, 2014

Added CIM compliance for process events

Version 0.1.0
Nov. 24, 2014

Initial CIM-compliant Release

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