Detection rules › Sigma
Active Directory Computers Enumeration With Get-AdComputer
Detects usage of the "Get-AdComputer" to enumerate Computers or properties within Active Directory.
MITRE ATT&CK coverage
| Tactic | Techniques |
|---|---|
| Discovery |
Telemetry coverage
| Provider | Record / event type |
|---|---|
| PowerShell | Event ID 4104: Creating Scriptblock text (MessageNumber of MessageTotal). |
Rule body
title: Active Directory Computers Enumeration With Get-AdComputer
id: 36bed6b2-e9a0-4fff-beeb-413a92b86138
status: test
description: Detects usage of the "Get-AdComputer" to enumerate Computers or properties within Active Directory.
references:
- https://learn.microsoft.com/en-us/powershell/module/activedirectory/get-adcomputer
- https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1018/T1018.md
- https://github.com/redcanaryco/atomic-red-team/blob/02cb591f75064ffe1e0df9ac3ed5972a2e491c97/atomics/T1087.002/T1087.002.md
author: frack113
date: 2022-03-17
modified: 2023-07-08
tags:
- attack.discovery
- attack.t1018
- attack.t1087.002
logsource:
product: windows
category: ps_script
definition: 'Requirements: Script Block Logging must be enabled'
detection:
selection_cmdlet:
ScriptBlockText|contains: 'Get-AdComputer '
selection_option:
ScriptBlockText|contains:
- '-Filter '
- '-LDAPFilter '
- '-Properties '
condition: all of selection_*
falsepositives:
- Unknown
level: low
Stages and Predicates
Stage 0: condition
all of selection_*Stage 1: selection_cmdlet
selection_cmdlet:
ScriptBlockText|contains: 'Get-AdComputer '
Stage 2: selection_option
selection_option:
ScriptBlockText|contains:
- '-Filter '
- '-LDAPFilter '
- '-Properties '
Indicators
These rows show field, operator, and value matches.
| Field | Kind | Values | Search |
|---|---|---|---|
ScriptBlockText | match |
| field:"ScriptBlockText" kind:match |