Potential Network Share Discovery

Adversaries may look for folders and drives shared on remote systems to identify sources of information to gather as a precursor for collection and identify potential systems of interest for Lateral Movement.

Rule type: eql
Rule indices:

logs-system.security*
logs-windows.*
winlogbeat-*

Rule Severity: low
Risk Score: 21
Runs every: 60m
Searches indices from: now-119m
Maximum alerts per execution: ?
References:

Tags:

Domain: Endpoint
OS: Windows
Use Case: Threat Detection
Tactic: Discovery
Tactic: Collection
Rule Type: BBR
Data Source: Windows Security Event Logs

Version: ?
Rule authors:

Elastic

Rule license: Elastic License v2

Rule Query

		sequence by user.name, source.port, source.ip with maxspan=15s
 [file where event.action == "network-share-object-access-checked" and
  winlog.event_data.ShareName in ("\\\\*\\ADMIN$", "\\\\*\\C$") and
  source.ip != null and source.ip != "0.0.0.0" and source.ip != "::1" and source.ip != "::" and source.ip != "127.0.0.1"]
 [file where event.action == "network-share-object-access-checked" and
  winlog.event_data.ShareName in ("\\\\*\\ADMIN$", "\\\\*\\C$") and
  source.ip != null and source.ip != "0.0.0.0" and source.ip != "::1" and source.ip != "::" and source.ip != "127.0.0.1"]

	

Framework: MITRE ATT&CK

Tactic:
- Name: Discovery
- Id: TA0007
- Reference URL: https://attack.mitre.org/tactics/TA0007/
Technique:
- Name: Network Share Discovery
- Id: T1135
- Reference URL: https://attack.mitre.org/techniques/T1135/

Framework: MITRE ATT&CK

Tactic:
- Name: Collection
- Id: TA0009
- Reference URL: https://attack.mitre.org/tactics/TA0009/
Technique:
- Name: Data from Network Shared Drive
- Id: T1039
- Reference URL: https://attack.mitre.org/techniques/T1039/