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IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
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Elastic Docs ›Elastic Security Solution [8.10] ›Downloadable rule update v8.10.11

Potential Enumeration via Active Directory Web Service

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Potential Enumeration via Active Directory Web Service

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Identifies processes loading Active Directory related modules followed by a network connection to the ADWS dedicated TCP port. Adversaries may abuse the ADWS Windows service that allows Active Directory to be queried via this web service.

Rule type: eql

Rule indices:

  • logs-endpoint.events.*

Severity: medium

Risk score: 47

Runs every: 5m

Searches indices from: now-9m (Date Math format, see also Additional look-back time)

Maximum alerts per execution: 100

References:

Tags:

  • Domain: Endpoint
  • OS: Windows
  • Use Case: Threat Detection
  • Tactic: Discovery
  • Data Source: Elastic Defend

Version: 1

Rule authors:

  • Elastic

Rule license: Elastic License v2

Rule query

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sequence by process.entity_id with maxspan=3m
 [library where host.os.type == "windows" and
  dll.name : ("System.DirectoryServices*.dll", "System.IdentityModel*.dll") and
  not user.id in ("S-1-5-18", "S-1-5-19", "S-1-5-20") and
  not process.executable :
                ("?:\\windows\\system32\\dsac.exe",
                 "?:\\program files\\powershell\\?\\pwsh.exe",
                 "?:\\windows\\system32\\windowspowershell\\*.exe",
                 "?:\\windows\\syswow64\\windowspowershell\\*.exe",
                 "?:\\program files\\microsoft monitoring agent\\*.exe",
                 "?:\\windows\\adws\\microsoft.activedirectory.webservices.exe")]
 [network where host.os.type == "windows" and destination.port == 9389 and source.port >= 49152 and
  network.direction == "egress" and network.transport == "tcp" and not cidrmatch(destination.ip, "127.0.0.0/8", "::1/128")]

Framework: MITRE ATT&CKTM

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