Excessive share permissions

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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

Tables Used

This content item queries data from the following tables:

Table Selection Criteria Transformations Ingestion API Lake-Only
SecurityEvent EventID == "5143" ?

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