Try in Splunk Security Cloud

Description

This search looks for Event Code 4742 (Computer Change) or EventCode 4624 (An account was successfully logged on) with an anonymous account.

  • Type: Hunting
  • Product: Splunk Enterprise, Splunk Enterprise Security, Splunk Cloud
  • Datamodel:
  • Last Updated: 2020-09-18
  • Author: Rod Soto, Jose Hernandez, Splunk
  • ID: 1400624a-d42d-484d-8843-e6753e6e3645

ATT&CK

ID Technique Tactic
T1210 Exploitation of Remote Services Lateral Movement
`wineventlog_security` EventCode=4624 OR EventCode=4742 TargetUserName="ANONYMOUS LOGON" LogonType=3 
| stats count values(host) as host, values(TargetDomainName) as Domain, values(user) as user 
| `detect_computer_changed_with_anonymous_account_filter`

Associated Analytic Story

How To Implement

This search requires audit computer account management to be enabled on the system in order to generate Event ID 4742. We strongly recommend that you specify your environment-specific configurations (index, source, sourcetype, etc.) for Windows Event Logs. Replace the macro definition with configurations for your Splunk environment. The search also uses a post-filter macro designed to filter out known false positives.

Required field

  • _time
  • EventCode
  • TargetUserName
  • LogonType
  • TargetDomainName
  • user

Kill Chain Phase

  • Actions on Objectives

Known False Positives

None thus far found

RBA

Risk Score Impact Confidence Message
49.0 70 70 The following $EventCode$ occurred on $dest$ by $user$ with Logon Type 3, which may be indicative of the an account or group being changed by an anonymous account.

CVE

ID Summary CVSS
CVE-2020-1472 An elevation of privilege vulnerability exists when an attacker establishes a vulnerable Netlogon secure channel connection to a domain controller, using the Netlogon Remote Protocol (MS-NRPC), aka 'Netlogon Elevation of Privilege Vulnerability'. 9.3

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