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Description

This analytic detects instances where a user adds themselves to an Active Directory (AD) group. This activity is a common indicator of privilege escalation, where a user attempts to gain unauthorized access to higher privileges or sensitive resources. By monitoring AD logs, this detection identifies such suspicious behavior, which could be part of a larger attack strategy aimed at compromising critical systems and data.

  • Type: TTP

  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud

  • Last Updated: 2023-12-18
  • Author: Dean Luxton
  • ID: 065f2701-b7ea-42f5-9ec4-fbc2261165f9

Annotations

ATT&CK

ATT&CK

ID Technique Tactic
T1098 Account Manipulation Persistence, Privilege Escalation
Kill Chain Phase
  • Installation
  • Exploitation
NIST
  • DE.CM
CIS20
  • CIS 10
CVE 


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`wineventlog_security` EventCode IN (4728) 
| where user=src_user 
| stats min(_time) as _time dc(user) as usercount, values(user) as user values(user_category) as user_category values(src_user_category) as src_user_category values(dvc) as dvc by signature, Group_Name, src_user 
| `windows_ad_add_self_to_group_filter`

Macros

The SPL above uses the following Macros:

:information_source: windows_ad_add_self_to_group_filter is a empty macro by default. It allows the user to filter out any results (false positives) without editing the SPL.

Required fields

List of fields required to use this analytic.

  • EventCode
  • user
  • src_user
  • signature
  • Group_Name

How To Implement

This analytic requires eventCode 4728 to be ingested.

Known False Positives

Unknown

Associated Analytic Story

RBA

Risk Score Impact Confidence Message
50.0 50 100 $user$ added themselves to AD Group $Group_Name$

:information_source: The Risk Score is calculated by the following formula: Risk Score = (Impact * Confidence/100). Initial Confidence and Impact is set by the analytic author.

Reference

Test Dataset

Replay any dataset to Splunk Enterprise by using our replay.py tool or the UI. Alternatively you can replay a dataset into a Splunk Attack Range

source | version: 1