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ADTimeline

Splunk AppInspect Passed
Admins: Please read about Splunk Enterprise 8.0 and the Python 2.7 end-of-life changes and impact on apps and upgradeshere.
Overview
Details
Active Directory is a prime target in mostly all cyberattacks, and attackers often attempt to gain Domain Admin privileges and maintain their access. That is why it is crucial for security teams to monitor the changes occurring on Active Directory.

Active Directory modifications are recorded in the Domain Controllers Windows event logs but its scope/completeness depends on the auditing strategy configured. Unfortunately, those events are too rarely centralized, analyzed and archived. As a consequence, replication metadata is sometimes the only artefact left for DFIR analyst to characterize changes made on the Active Directory.

The ADTimeline application for splunk processes and analyses the Active Directory data collected by the ADTimeline PowerShell script.

The ADTimeline PowerShell script generates a timeline of Active Directory changes based on replication metadata and is available on github.

The ADTimeline script generates a timeline based on Active Directory replication metadata for objects considered of interest. Replication metadata gives you the time at which each replicated attribute for a given object was last changed. As a result, the timeline of modifications is partial. In order to be able to process this data with Splunk run the ADTimeline PowerShell script against your Active Directory domain as described on the project homepage.

After processing the ADTimeline script you should have two or three files to import in Splunk (%DOMAINFQDN% is the Active Directory fully qualified domain name):

  • timeline_%DOMAINFQDN%.csv: The timeline generated with the AD replication metadata of objects retrieved. The corresponding sourcetype is adtimeline.
  • ADobjects_%DOMAINFQDN%.xml: Objects of interest retrieved via LDAP. The corresponding sourcetype is adobjects.
  • gcADobjects_%DOMAINFQDN%.xml: If any, objects of interest retrieved via the Global Catalog. The corresponding sourcetype is gcobjects.

The app's "Getting started" page will give you the instructions for the import process.

Once the data indexed, the dashboards generated by the app will help the DFIR analyst to spot some Active Directory persistence mechanisms, misconfigurations, brute force attacks, security audit logging bypass, mail exfiltration… It will also help the analyst to characterize changes made in the Active Directory a long time ago if you do not have sufficient security eventlog history.

The four dashboards available for the DFIR analyst are:

  • The “Active Directory Infrastructure” dashboard gives you general information on which components to investigate.
  • The “sensitive accounts” dashboard provides an inventory of the privileged accounts in the domain and accounts prone to common attack scenarios due to their configuration.
  • The “investigate timeframe” dashboard provides statistics and charts of modification occurring on the AD domain for a given period of time. Use this dashboard if you already know what timeframe to investigate.
  • Finally, the “track suspicious activity” dashboard tries to spot malicious modifications made on the Active Directory such as ACL edition, group membership modification, various persistence techniques, Audit policy modifications, DCShadow operations, Replication metadata tampering, Exchange on premises Email exfiltration…

Release Notes

Version 1.0.1
Feb. 26, 2020

Minor display bug corrected

Version 1.0.0
Feb. 26, 2020

30
Installs
93
Downloads
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