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The query searches for event 5143, which is triggered when a share is created or changed and includes de share permissions. First it checks to see if this is a whitelisted share for the system (e.g. domaincontroller netlogon, printserver print$ etc.). The share permissions are then checked against 'allow' rule (A) for a number of well known overly permissive groups, like all users, guests, authenticated users etc. If these are found, an alert is raised so the share creation may be audited. Note:
| Attribute | Value |
|---|---|
| Type | Analytic Rule |
| Solution | FalconFriday |
| ID | aba0b08c-aace-40c5-a21d-39153023dcaa |
| Severity | Medium |
| Status | Available |
| Kind | Scheduled |
| Tactics | Collection, Discovery |
| Techniques | T1039, T1135 |
| Required Connectors | SecurityEvents, WindowsSecurityEvents |
| Source | View on GitHub |
This content item queries data from the following tables:
| Table | Selection Criteria | Transformations | Ingestion API | Lake-Only |
|---|---|---|---|---|
SecurityEvent |
EventID == "5143" |
✓ | ✓ | ? |
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