Suspicious Get Information for SMB Share - PowerShell Module

Status: test
Severity: low
Log source: category ps_module, 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.

Known false positives

Administrator script

MITRE ATT&CK coverage

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

Telemetry coverage

Provider	Record / event type
PowerShell	Event ID 4103: Payload Context: ContextInfo User Data: UserData.

Rule body

title: Suspicious Get Information for SMB Share - PowerShell Module
id: 6942bd25-5970-40ab-af49-944247103358
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: 2022-12-02
tags:
    - attack.discovery
    - attack.t1069.001
logsource:
    product: windows
    category: ps_module
    definition: 0ad03ef1-f21b-4a79-8ce8-e6900c54b65b
detection:
    selection:
        - Payload|contains: get-smbshare
        - ContextInfo|contains: get-smbshare
    condition: selection
falsepositives:
    - Administrator script
level: low

Stages and Predicates

Stage 0: `condition`

selection

Stage 1: `selection`

selection:
    - Payload|contains: get-smbshare
    - ContextInfo|contains: get-smbshare

Indicators

These rows show field, operator, and value matches.

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