Elastic Security Detection Rules

PowerShell Share Enumeration Script

Last updated 2 months ago on 2026-02-09
Created 4 years ago on 2022-08-17

About

Detects PowerShell scripts that uses ShareFinder functions (Invoke-ShareFinder/Invoke-ShareFinderThreaded) or Windows share enumeration APIs (shi1_netname/shi1_remark with NetShareEnum/NetApiBufferFree). Attackers use share enumeration to map accessible network shares for collection, lateral movement, or ransomware targeting.
Tags
Domain: EndpointOS: WindowsUse Case: Threat DetectionTactic: DiscoveryTactic: CollectionTactic: ExecutionData Source: PowerShell LogsLanguage: kuery
Severity
high
Risk Score
73
MITRE ATT&CK™

Discovery (TA0007)(external, opens in a new tab or window)

↳ Network Share Discovery (T1135)(external, opens in a new tab or window)

Execution (TA0002)(external, opens in a new tab or window)

↳ Command and Scripting Interpreter (T1059)(external, opens in a new tab or window)

↳ Native API (T1106)(external, opens in a new tab or window)

Collection (TA0009)(external, opens in a new tab or window)

↳ Data from Network Shared Drive (T1039)(external, opens in a new tab or window)

License
Elastic License v2(external, opens in a new tab or window)

Definition

Rule Type
Query (Kibana Query Language)
Integration Pack
Prebuilt Security Detection Rules
Index Patterns
winlogbeat-*logs-windows.powershell*
Related Integrations

windows(external, opens in a new tab or window)

Query
text code block:
event.category:process and host.os.type:windows and
  powershell.file.script_block_text:(
    "Invoke-ShareFinder" or
    "Invoke-ShareFinderThreaded" or
    (
      "shi1_netname" and
      "shi1_remark"
    ) or
    (
      "NetShareEnum" and
      "NetApiBufferFree"
    )
  ) and not user.id : "S-1-5-18"

Install detection rules in Elastic Security

Detect PowerShell Share Enumeration Script in the Elastic Security detection engine by installing this rule into your Elastic Stack.

To setup this rule, check out the installation guide for Prebuilt Security Detection Rules(external, opens in a new tab or window).