Suspicious Get Information for SMB Share

Status: test
Severity: low
Log source: category ps_script, product windows
Author: frack113
Source: github.com/SigmaHQ/sigma

Adversaries may look for folders and drives shared on remote systems as a means of identifying sources of information to gather as a precursor for Collection and to identify potential systems of interest for Lateral Movement. Networks often contain shared network drives and folders that enable users to access file directories on various systems across a network.

MITRE ATT&CK coverage

Tactic	Techniques
Discovery	`T1069.001` Permission Groups Discovery: Local Groups

Telemetry coverage

Provider	Record / event type
PowerShell	Event ID 4104: Creating Scriptblock text (MessageNumber of MessageTotal).

Rule body

title: Suspicious Get Information for SMB Share
id: 95f0643a-ed40-467c-806b-aac9542ec5ab
status: test
description: |
    Adversaries may look for folders and drives shared on remote systems as a means of identifying sources of information to gather as
    a precursor for Collection and to identify potential systems of interest for Lateral Movement.
    Networks often contain shared network drives and folders that enable users to access file directories on various systems across a network.
references:
    - https://github.com/redcanaryco/atomic-red-team/blob/f339e7da7d05f6057fdfcdd3742bfcf365fee2a9/atomics/T1069.002/T1069.002.md
author: frack113
date: 2021-12-15
modified: 2022-12-25
tags:
    - attack.discovery
    - attack.t1069.001
logsource:
    product: windows
    category: ps_script
    definition: 'Requirements: Script Block Logging must be enabled'
detection:
    selection:
        ScriptBlockText|contains: get-smbshare
    condition: selection
falsepositives:
    - Unknown
level: low

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    ScriptBlockText|contains: get-smbshare

Indicators

These rows show field, operator, and value matches.

Field	Kind	Values	Search
`ScriptBlockText`	match	`get-smbshare`	`field:"ScriptBlockText" kind:match value:"get-smbshare"`