Potential Enumeration via Active Directory Web Serviceedit
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.library-*
- logs-endpoint.events.network-*
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: 2
Rule authors:
- Elastic
Rule license: Elastic License v2
Rule queryedit
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
-
Tactic:
- Name: Discovery
- ID: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
-
Technique:
- Name: Remote System Discovery
- ID: T1018
- Reference URL: https://attack.mitre.org/techniques/T1018/